In Mississippi: 68 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Oct 23, 2026 and Apr 29, 2030 (277 limits); 6 of them reported a median above that limit between Oct 1, 2025 and Sep 30, 2026. EPA's file of Oct 16, 2026.

By state: all · IA 204 · PA 172 · LA 165 · OH 134 · MS 68 · AR 58 · TX 57 · MI 53 · GA 52 · VA 52 · MD 48 · NJ 35 · IN 31 · SC 23 · KS 21 · MN 21 · NY 21 · MO 20 · WV 17 · OR 16 · IL 14 · FL 10 · NE 9 · OK 8 · TN 8 · CO 7 · UT 7 · NM 6 · CA 5 · SD 5 · CT 3 · ID 3 · ME 2 · WI 2 · AL 1 · DC 1 · KY 1 · MT 1 · NH 1 · PR 1 · VT 1 · WA 1

Plant	Permit	State	Type	Design flow	Parameter	New limit	Effective	Today's median	× limit
OKHISSA LAKE SEWER DISTRICT WASTEWATER FACILITY	MS0060291	MS	Sewage plant	.4 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Dec 18, 2026	10.1 mg/L (3 values)	7.37×
OKHISSA LAKE SEWER DISTRICT WASTEWATER FACILITY	MS0060291	MS	Sewage plant	.4 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 4.6 lb/d, tighter	Dec 18, 2026	10.1 lb/d (3 values)	2.2×
OKHISSA LAKE SEWER DISTRICT WASTEWATER FACILITY	MS0060291	MS	Sewage plant	.4 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 6.9 lb/d, tighter	Dec 18, 2026	10.1 lb/d (3 values)	1.46×
TUNICA COUNTY UTILITY DISTRICT, DUNDEE FACILITY	MS0058165	MS	Sewage plant	.05 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Feb 20, 2027	6.55 mg/L (3 values)	4.78×
TUNICA COUNTY UTILITY DISTRICT, DUNDEE FACILITY	MS0058165	MS	Sewage plant	.05 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	Feb 20, 2027	6.55 mg/L (3 values)	3.2×
STARKVILLE POTW	MS0036145	MS	Sewage plant, major	10 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	Aug 31, 2028	16 mg/L (11 values)	7.8×
STARKVILLE POTW	MS0036145	MS	Sewage plant, major	10 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 171 lb/d, tighter	Aug 31, 2028	836 lb/d (11 values)	4.89×
STARKVILLE POTW	MS0036145	MS	Sewage plant, major	10 MGD	Nitrogen, ammonia total [as N]	monthly average 114 lb/d, tighter	Aug 31, 2028	348 lb/d (11 values)	3.05×
HARRISON CO UTILITY AUTHORITY, DELISLE WASTEWATER TREATMENT FACILITY	MS0052574	MS	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 ug/L, tighter	Jun 22, 2029	1266 ug/L (4 values)	924×
JACKSON COUNTY UTILITY AUTHORITY, POTW 1C	MS0045446	MS	Sewage plant, major	5 MGD	Nitrogen, ammonia total [as N]	monthly average 1.39 mg/L, tighter	Dec 30, 2029	3.33 mg/L (11 values)	2.4×
JACKSON COUNTY UTILITY AUTHORITY, POTW 1C	MS0045446	MS	Sewage plant, major	5 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.1 mg/L, tighter	Dec 30, 2029	3.33 mg/L (11 values)	1.59×
JACKSON COUNTY UTILITY AUTHORITY, POTW 1C	MS0045446	MS	Sewage plant, major	5 MGD	Nitrogen, ammonia total [as N]	monthly average 80.1 lb/d, tighter	Dec 30, 2029	97.49 lb/d (11 values)	1.22×
WINONA POTW	MS0021024	MS	Sewage plant, major	1.2 MGD	Nitrogen, ammonia total [as N]	monthly average 1.5 mg/L, tighter	Apr 29, 2030	2.21 mg/L (9 values)	1.47×
WINONA POTW	MS0021024	MS	Sewage plant, major	1.2 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.2 mg/L, tighter	Apr 29, 2030	3.18 mg/L (9 values)	1.45×
BEAUMONT POTW	MS0020869	MS	Sewage plant	.13 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 5.4 lb/d, new	Oct 23, 2026	under 3 values	—
BEAUMONT POTW	MS0020869	MS	Sewage plant	.13 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 5 mg/L, new	Oct 23, 2026	under 3 values	—
BEAUMONT POTW	MS0020869	MS	Sewage plant	.13 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 8.1 lb/d, new	Oct 23, 2026	under 3 values	—
BEAUMONT POTW	MS0020869	MS	Sewage plant	.13 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 7.5 mg/L, new	Oct 23, 2026	under 3 values	—
KILMICHAEL POTW	MS0020001	MS	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 18 lb/d, tighter	Oct 24, 2026	under 3 values	—
KILMICHAEL POTW	MS0020001	MS	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 12 mg/L, tighter	Oct 24, 2026	under 3 values	—
KILMICHAEL POTW	MS0020001	MS	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 18 mg/L, tighter	Oct 24, 2026	under 3 values	—
KILMICHAEL POTW	MS0020001	MS	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 27 lb/d, tighter	Oct 24, 2026	under 3 values	—
BASSFIELD POTW	MS0024848	MS	Sewage plant	.065 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.74 lb/d, tighter	Oct 26, 2026	under 3 values	—
BASSFIELD POTW	MS0024848	MS	Sewage plant	.065 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Oct 26, 2026	under 3 values	—
BASSFIELD POTW	MS0024848	MS	Sewage plant	.065 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	Oct 26, 2026	under 3 values	—
BASSFIELD POTW	MS0024848	MS	Sewage plant	.065 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 1.11 lb/d, tighter	Oct 26, 2026	under 3 values	—
PURVIS POTW	MS0036536	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 6.4 lb/d, tighter	Nov 6, 2026	under 3 values	—
PURVIS POTW	MS0036536	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.5 mg/L, tighter	Nov 6, 2026	under 3 values	—
PURVIS POTW	MS0036536	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 9.6 lb/d, tighter	Nov 6, 2026	under 3 values	—
PURVIS POTW	MS0036536	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.3 mg/L, tighter	Nov 6, 2026	under 3 values	—
Presto Distribution Center	MS0058122	MS	Sewage plant	.015 MGD	Nitrogen, ammonia total [as N]	daily maximum 0.18 lb/d, tighter	Nov 13, 2026	under 3 values	—
Presto Distribution Center	MS0058122	MS	Sewage plant	.015 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.12 lb/d, tighter	Nov 13, 2026	under 3 values	—
LAMBERT POTW	MS0020231	MS	Sewage plant	.75 MGD	BOD, 5-day, 20 deg. C	maximum monthly average 50 lb/d, tighter	Nov 21, 2026	under 3 values	—
LAMBERT POTW	MS0020231	MS	Sewage plant	.75 MGD	BOD, 5-day, 20 deg. C	maximum monthly average 8 mg/L, tighter	Nov 21, 2026	under 3 values	—
LAMBERT POTW	MS0020231	MS	Sewage plant	.75 MGD	BOD, 5-day, 20 deg. C	maximum weekly average 75 lb/d, tighter	Nov 21, 2026	under 3 values	—
LAMBERT POTW	MS0020231	MS	Sewage plant	.75 MGD	BOD, 5-day, 20 deg. C	maximum weekly average 12 mg/L, tighter	Nov 21, 2026	under 3 values	—
LAMBERT POTW	MS0020231	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 9 lb/d, new	Nov 21, 2026	under 3 values	—
LAMBERT POTW	MS0020231	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, new	Nov 21, 2026	under 3 values	—
LAMBERT POTW	MS0020231	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 13 lb/d, new	Nov 21, 2026	under 3 values	—
LAMBERT POTW	MS0020231	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, new	Nov 21, 2026	under 3 values	—
LIBERTY POTW	MS0023752	MS	Sewage plant	.25 MGD	Chlorine, total residual	maximum monthly average 0.074 mg/L, tighter	Nov 21, 2026	under 3 values	—
LIBERTY POTW	MS0023752	MS	Sewage plant	.25 MGD	Chlorine, total residual	maximum weekly average 0.11 mg/L, tighter	Nov 21, 2026	under 3 values	—
LIBERTY POTW	MS0023752	MS	Sewage plant	.25 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 16.68 lb/d, new	Nov 21, 2026	under 3 values	—
LIBERTY POTW	MS0023752	MS	Sewage plant	.25 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 8 mg/L, new	Nov 21, 2026	under 3 values	—
LIBERTY POTW	MS0023752	MS	Sewage plant	.25 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 25.02 lb/d, new	Nov 21, 2026	under 3 values	—
LIBERTY POTW	MS0023752	MS	Sewage plant	.25 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 12 mg/L, new	Nov 21, 2026	under 3 values	—
DIAMONDHEAD WATER AND SEWER DISTRICT	MS0046078	MS	Sewage plant, major	2.5 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 125 lb/d, tighter	Dec 4, 2026	under 3 values	—
GREAT RIVER UTILITY OPERATING CO LLC, NEW HOPE PARK SUBDIVISION	MS0035921	MS	Industrial	.116 MGD	Nitrogen, ammonia total [as N]	daily maximum 2.16 mg/L, tighter	Dec 18, 2026	under 3 values	—
GREAT RIVER UTILITY OPERATING CO LLC, NEW HOPE PARK SUBDIVISION	MS0035921	MS	Industrial	.116 MGD	Nitrogen, ammonia total [as N]	daily maximum 2.1 lb/d, tighter	Dec 18, 2026	under 3 values	—
GREAT RIVER UTILITY OPERATING CO LLC, NEW HOPE PARK SUBDIVISION	MS0035921	MS	Industrial	.116 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.44 mg/L, tighter	Dec 18, 2026	under 3 values	—
GREAT RIVER UTILITY OPERATING CO LLC, NEW HOPE PARK SUBDIVISION	MS0035921	MS	Industrial	.116 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.39 lb/d, tighter	Dec 18, 2026	under 3 values	—
RIPLEY POTW	MS0020958	MS	Sewage plant	.97 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	Jan 4, 2027	0.2 mg/L (11 values)	0.0976×
FLORENCE POTW	MS0025275	MS	Sewage plant	.5 MGD	BOD, 5-day, 20 deg. C	monthly average 5 mg/L, tighter	Jan 5, 2027	4 mg/L (3 values)	0.8×
FLORENCE POTW	MS0025275	MS	Sewage plant	.5 MGD	BOD, 5-day, 20 deg. C	maximum weekly average 7.5 mg/L, tighter	Jan 5, 2027	4 mg/L (3 values)	0.533×
OXFORD, CITY OF, ROYAL OAKS WASTEWATER TREATMENT LAGOON	MS0052957	MS	Industrial	.03 MGD	Nitrogen, ammonia total [as N]	daily maximum 0.51 lb/d, new	Feb 13, 2027	under 3 values	—
OXFORD, CITY OF, ROYAL OAKS WASTEWATER TREATMENT LAGOON	MS0052957	MS	Industrial	.03 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.34 lb/d, new	Feb 13, 2027	under 3 values	—
OXFORD, CITY OF, ROYAL OAKS WASTEWATER TREATMENT LAGOON	MS0052957	MS	Industrial	.03 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, new	Feb 13, 2027	under 3 values	—
OXFORD, CITY OF, ROYAL OAKS WASTEWATER TREATMENT LAGOON	MS0052957	MS	Industrial	.03 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, new	Feb 13, 2027	under 3 values	—
TUNICA COUNTY UTILITY DISTRICT, DUNDEE FACILITY	MS0058165	MS	Sewage plant	.05 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.5 lb/d, tighter	Feb 20, 2027	0.014 lb/d (3 values)	0.028×
TUNICA COUNTY UTILITY DISTRICT, DUNDEE FACILITY	MS0058165	MS	Sewage plant	.05 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 0.8 lb/d, tighter	Feb 20, 2027	0.014 lb/d (3 values)	0.0175×
LAKE FOREST RANCH INC, LAKE FOREST RANCH CAMP	MS0048224	MS	Industrial	.02 MGD	Nitrogen, ammonia total [as N]	daily maximum 2.1 mg/L, tighter	Mar 20, 2027	under 3 values	—
LAKE FOREST RANCH INC, LAKE FOREST RANCH CAMP	MS0048224	MS	Industrial	.02 MGD	Nitrogen, ammonia total [as N]	daily maximum 0.34 lb/d, tighter	Mar 20, 2027	under 3 values	—
LAKE FOREST RANCH INC, LAKE FOREST RANCH CAMP	MS0048224	MS	Industrial	.02 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Mar 20, 2027	under 3 values	—
LAKE FOREST RANCH INC, LAKE FOREST RANCH CAMP	MS0048224	MS	Industrial	.02 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.23 lb/d, tighter	Mar 20, 2027	under 3 values	—
DCRUA, BRAYBOURNE SUBDIVISION	MS0053155	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Apr 5, 2027	0.84 mg/L (3 values)	0.613×
DCRUA, BRAYBOURNE SUBDIVISION	MS0053155	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 5.71 lb/d, tighter	Apr 5, 2027	3.1 lb/d (3 values)	0.543×
DCRUA, BRAYBOURNE SUBDIVISION	MS0053155	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	Apr 5, 2027	0.84 mg/L (3 values)	0.41×
DCRUA, BRAYBOURNE SUBDIVISION	MS0053155	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 8.56 lb/d, tighter	Apr 5, 2027	3.1 lb/d (3 values)	0.362×
OXFORD, CITY OF, WESTERN HILLS WWTP	MS0022829	MS	Industrial	.024 MGD	Nitrogen, ammonia total [as N]	daily maximum 0.41 lb/d, new	Apr 11, 2027	under 3 values	—
OXFORD, CITY OF, WESTERN HILLS WWTP	MS0022829	MS	Industrial	.024 MGD	Nitrogen, ammonia total [as N]	daily maximum 2.05 mg/L, new	Apr 11, 2027	under 3 values	—
OXFORD, CITY OF, WESTERN HILLS WWTP	MS0022829	MS	Industrial	.024 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.27 lb/d, new	Apr 11, 2027	under 3 values	—
OXFORD, CITY OF, WESTERN HILLS WWTP	MS0022829	MS	Industrial	.024 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, new	Apr 11, 2027	under 3 values	—
CLINTON POTW, LOVETT	MS0023230	MS	Sewage plant	.276 MGD	BOD, 5-day, 20 deg. C	maximum monthly average 7.1 mg/L, tighter	Apr 29, 2027	2 mg/L (12 values)	0.282×
CLINTON POTW, LOVETT	MS0023230	MS	Sewage plant	.276 MGD	BOD, 5-day, 20 deg. C	maximum weekly average 10.7 mg/L, tighter	Apr 29, 2027	2 mg/L (12 values)	0.187×
CLINTON POTW, LOVETT	MS0023230	MS	Sewage plant	.276 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.1 mg/L, tighter	Apr 29, 2027	0.1 mg/L (12 values)	0.0909×
TYLERTOWN POTW	MS0020681	MS	Sewage plant	.42 MGD	Chlorine, total residual	maximum monthly average 0.36 mg/L, tighter	Apr 29, 2027	under 3 values	—
TYLERTOWN POTW	MS0020681	MS	Sewage plant	.42 MGD	Chlorine, total residual	maximum weekly average 0.62 mg/L, tighter	Apr 29, 2027	under 3 values	—
CLINTON POTW, SOUTHSIDE	MS0054992	MS	Sewage plant, major	3.5 MGD	Nitrogen, ammonia total [as N]	monthly average 1.37 mg/L, tighter	May 1, 2027	0.1 mg/L (12 values)	0.073×
CLINTON POTW, SOUTHSIDE	MS0054992	MS	Sewage plant, major	3.5 MGD	Nitrogen, ammonia total [as N]	monthly average 40 lb/d, tighter	May 1, 2027	1.905 lb/d (12 values)	0.0476×
CLINTON POTW, SOUTHSIDE	MS0054992	MS	Sewage plant, major	3.5 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.1 mg/L, tighter	May 1, 2027	0.1 mg/L (12 values)	0.0476×
CLINTON POTW, SOUTHSIDE	MS0054992	MS	Sewage plant, major	3.5 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 60 lb/d, tighter	May 1, 2027	2.5 lb/d (12 values)	0.0417×
SUMRALL POTW	MS0035955	MS	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 2.3 lb/d, tighter	May 6, 2027	under 3 values	—
SUMRALL POTW	MS0035955	MS	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	May 6, 2027	under 3 values	—
SUMRALL POTW	MS0035955	MS	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 3.4 lb/d, tighter	May 6, 2027	under 3 values	—
SUMRALL POTW	MS0035955	MS	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	May 6, 2027	under 3 values	—
TUTWILER POTW	MS0025054	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	May 16, 2027	0.33 mg/L (3 values)	0.241×
TUTWILER POTW	MS0025054	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	May 16, 2027	0.33 mg/L (3 values)	0.161×
TUTWILER POTW	MS0025054	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 8.57 lb/d, tighter	May 16, 2027	1.1 lb/d (3 values)	0.128×
TUTWILER POTW	MS0025054	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 12.85 lb/d, tighter	May 16, 2027	1.1 lb/d (3 values)	0.0856×
CLINTON BRIARS POTW	MS0047619	MS	Sewage plant	.63 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	May 30, 2027	0.23 mg/L (12 values)	0.168×
CLINTON BRIARS POTW	MS0047619	MS	Sewage plant	.63 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	May 30, 2027	0.23 mg/L (12 values)	0.112×
CLINTON BRIARS POTW	MS0047619	MS	Sewage plant	.63 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 7.2 lb/d, tighter	May 30, 2027	0.63 lb/d (12 values)	0.0875×
CLINTON BRIARS POTW	MS0047619	MS	Sewage plant	.63 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 11.9 lb/d, tighter	May 30, 2027	0.63 lb/d (12 values)	0.0529×
UTICA POTW, SOUTH	MS0020613	MS	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 2.1 lb/d, tighter	Jun 19, 2027	under 3 values	—
UTICA POTW, SOUTH	MS0020613	MS	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Jun 19, 2027	under 3 values	—
UTICA POTW, SOUTH	MS0020613	MS	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 3.1 lb/d, tighter	Jun 19, 2027	under 3 values	—
UTICA POTW, SOUTH	MS0020613	MS	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.1 mg/L, tighter	Jun 19, 2027	under 3 values	—
STONE COUNTY UTILITY AUTHORITY, SOUTH STONE COUNTY WWTF	MS0061182	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	monthly average 1.37 mg/L, tighter	Jun 21, 2027	under 3 values	—
STONE COUNTY UTILITY AUTHORITY, SOUTH STONE COUNTY WWTF	MS0061182	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	monthly average 8.56 lb/d, tighter	Jun 21, 2027	under 3 values	—
STONE COUNTY UTILITY AUTHORITY, SOUTH STONE COUNTY WWTF	MS0061182	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 12.8 lb/d, tighter	Jun 21, 2027	under 3 values	—
STONE COUNTY UTILITY AUTHORITY, SOUTH STONE COUNTY WWTF	MS0061182	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	Jun 21, 2027	under 3 values	—
J AND G ENTERPRISES LLC, PRICE TRAILER PARK	MS0054887	MS	Industrial	.0018 MGD	Nitrogen, ammonia total [as N]	daily maximum 7.5 mg/L, new	Jun 29, 2027	under 3 values	—
J AND G ENTERPRISES LLC, PRICE TRAILER PARK	MS0054887	MS	Industrial	.0018 MGD	Nitrogen, ammonia total [as N]	daily maximum 0.11 lb/d, new	Jun 29, 2027	under 3 values	—
J AND G ENTERPRISES LLC, PRICE TRAILER PARK	MS0054887	MS	Industrial	.0018 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 5 mg/L, new	Jun 29, 2027	under 3 values	—
J AND G ENTERPRISES LLC, PRICE TRAILER PARK	MS0054887	MS	Industrial	.0018 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.075 lb/d, new	Jun 29, 2027	under 3 values	—
MABEN POTW	MS0020966	MS	Sewage plant	.141 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.6 lb/d, tighter	Jun 29, 2027	under 3 values	—
MABEN POTW	MS0020966	MS	Sewage plant	.141 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Jun 29, 2027	under 3 values	—
MABEN POTW	MS0020966	MS	Sewage plant	.141 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.4 lb/d, tighter	Jun 29, 2027	under 3 values	—
MABEN POTW	MS0020966	MS	Sewage plant	.141 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.1 mg/L, tighter	Jun 29, 2027	under 3 values	—
DEKALB POTW, NUMBER 2	MS0020974	MS	Sewage plant	.16 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.83 lb/d, tighter	Jul 30, 2027	under 3 values	—
DEKALB POTW, NUMBER 2	MS0020974	MS	Sewage plant	.16 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Jul 30, 2027	under 3 values	—
DEKALB POTW, NUMBER 2	MS0020974	MS	Sewage plant	.16 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.7 lb/d, tighter	Jul 30, 2027	under 3 values	—
DEKALB POTW, NUMBER 2	MS0020974	MS	Sewage plant	.16 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.1 mg/L, tighter	Jul 30, 2027	under 3 values	—
LAKE POTW	MS0025194	MS	Sewage plant	.12 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 2 mg/L, tighter	Aug 6, 2027	under 3 values	—
LAKE POTW	MS0025194	MS	Sewage plant	.12 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 2 lb/d, tighter	Aug 6, 2027	under 3 values	—
LAKE POTW	MS0025194	MS	Sewage plant	.12 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 3 mg/L, tighter	Aug 6, 2027	under 3 values	—
LAKE POTW	MS0025194	MS	Sewage plant	.12 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 3 lb/d, tighter	Aug 6, 2027	under 3 values	—
CRAWFORD POTW	MS0039560	MS	Sewage plant	.06 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.69 lb/d, tighter	Aug 13, 2027	under 3 values	—
CRAWFORD POTW	MS0039560	MS	Sewage plant	.06 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Aug 13, 2027	under 3 values	—
CRAWFORD POTW	MS0039560	MS	Sewage plant	.06 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.1 mg/L, tighter	Aug 13, 2027	under 3 values	—
CRAWFORD POTW	MS0039560	MS	Sewage plant	.06 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 1 lb/d, tighter	Aug 13, 2027	under 3 values	—
HOLLY SPRINGS POTW, NUMBER 1	MS0025313	MS	Sewage plant	.99 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 11.5 lb/d, tighter	Aug 28, 2027	under 3 values	—
HOLLY SPRINGS POTW, NUMBER 1	MS0025313	MS	Sewage plant	.99 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.39 mg/L, tighter	Aug 28, 2027	under 3 values	—
HOLLY SPRINGS POTW, NUMBER 1	MS0025313	MS	Sewage plant	.99 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 17.2 lb/d, tighter	Aug 28, 2027	under 3 values	—
HOLLY SPRINGS POTW, NUMBER 1	MS0025313	MS	Sewage plant	.99 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.08 mg/L, tighter	Aug 28, 2027	under 3 values	—
SEBASTOPOL WATER ASSOCIATION	MS0026727	MS	Industrial	.075 MGD	Nitrogen, ammonia total [as N]	daily maximum 1.9 lb/d, tighter	Sep 23, 2027	under 3 values	—
SEBASTOPOL WATER ASSOCIATION	MS0026727	MS	Industrial	.075 MGD	Nitrogen, ammonia total [as N]	daily maximum 3 mg/L, tighter	Sep 23, 2027	under 3 values	—
SEBASTOPOL WATER ASSOCIATION	MS0026727	MS	Industrial	.075 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.3 lb/d, tighter	Sep 23, 2027	under 3 values	—
SEBASTOPOL WATER ASSOCIATION	MS0026727	MS	Industrial	.075 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 2 mg/L, tighter	Sep 23, 2027	under 3 values	—
FAYETTE POTW, NORTHEAST	MS0025984	MS	Sewage plant	.208 MGD	Chlorine, total residual	monthly average 0.353 mg/L, new	Sep 29, 2027	under 3 values	—
FAYETTE POTW, NORTHEAST	MS0025984	MS	Sewage plant	.208 MGD	E. coli	monthly average 126 #/100mL, new	Sep 29, 2027	under 3 values	—
FAYETTE POTW, NORTHEAST	MS0025984	MS	Sewage plant	.208 MGD	E. coli	maximum weekly average 410 #/100mL, new	Sep 29, 2027	under 3 values	—
BYHALIA POTW	MS0052477	MS	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 5 mg/L, new	Sep 30, 2027	under 3 values	—
BYHALIA POTW	MS0052477	MS	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 25 lb/d, new	Sep 30, 2027	under 3 values	—
BYHALIA POTW	MS0052477	MS	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 7.5 mg/L, new	Sep 30, 2027	under 3 values	—
BYHALIA POTW	MS0052477	MS	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 37.5 lb/d, new	Sep 30, 2027	under 3 values	—
POTTS CAMP POTW, NORTHWEST	MS0020532	MS	Sewage plant	.087 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 12 mg/L, tighter	Oct 1, 2027	under 3 values	—
POTTS CAMP POTW, NORTHWEST	MS0020532	MS	Sewage plant	.087 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 8.7 lb/d, tighter	Oct 1, 2027	under 3 values	—
POTTS CAMP POTW, NORTHWEST	MS0020532	MS	Sewage plant	.087 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 18 mg/L, tighter	Oct 1, 2027	under 3 values	—
LOUISE POTW	MS0044512	MS	Sewage plant	.043 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 3 mg/L, tighter	Oct 28, 2027	under 3 values	—
LOUISE POTW	MS0044512	MS	Sewage plant	.043 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.07 lb/d, tighter	Oct 28, 2027	under 3 values	—
LOUISE POTW	MS0044512	MS	Sewage plant	.043 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 4.5 mg/L, tighter	Oct 28, 2027	under 3 values	—
LOUISE POTW	MS0044512	MS	Sewage plant	.043 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 1.6 lb/d, tighter	Oct 28, 2027	under 3 values	—
LOUISE POTW	MS0044512	MS	Sewage plant	.043 MGD	Nitrogen, total [as N]	maximum monthly average 4.13 lb/d, new	Oct 28, 2027	under 3 values	—
LOUISE POTW	MS0044512	MS	Sewage plant	.043 MGD	Nitrogen, total [as N]	maximum weekly average 6.19 lb/d, new	Oct 28, 2027	under 3 values	—
LOUISE POTW	MS0044512	MS	Sewage plant	.043 MGD	Phosphorus, total [as P]	maximum monthly average 1.87 lb/d, new	Oct 28, 2027	under 3 values	—
LOUISE POTW	MS0044512	MS	Sewage plant	.043 MGD	Phosphorus, total [as P]	maximum weekly average 2.8 lb/d, new	Oct 28, 2027	under 3 values	—
CENTRAL HINDS ACADEMY	MS0030015	MS	Industrial	.014 MGD	Nitrogen, ammonia total [as N]	daily maximum 2.1 mg/L, tighter	Oct 30, 2027	under 3 values	—
CENTRAL HINDS ACADEMY	MS0030015	MS	Industrial	.014 MGD	Nitrogen, ammonia total [as N]	daily maximum 0.24 lb/d, tighter	Oct 30, 2027	under 3 values	—
CENTRAL HINDS ACADEMY	MS0030015	MS	Industrial	.014 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.16 lb/d, tighter	Oct 30, 2027	under 3 values	—
CENTRAL HINDS ACADEMY	MS0030015	MS	Industrial	.014 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Oct 30, 2027	under 3 values	—
GRACE POTW	MS0052124	MS	Sewage plant	.02 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.23 lb/d, tighter	Nov 4, 2027	under 3 values	—
GRACE POTW	MS0052124	MS	Sewage plant	.02 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Nov 4, 2027	under 3 values	—
GRACE POTW	MS0052124	MS	Sewage plant	.02 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.1 mg/L, tighter	Nov 4, 2027	under 3 values	—
GRACE POTW	MS0052124	MS	Sewage plant	.02 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 0.34 lb/d, tighter	Nov 4, 2027	under 3 values	—
SHELBY POTW	MS0025089	MS	Sewage plant	.5 MGD	BOD, 5-day, 20 deg. C	maximum monthly average 17 mg/L, tighter	Nov 8, 2027	under 3 values	—
SHELBY POTW	MS0025089	MS	Sewage plant	.5 MGD	BOD, 5-day, 20 deg. C	maximum monthly average 70.8 lb/d, tighter	Nov 8, 2027	under 3 values	—
SHELBY POTW	MS0025089	MS	Sewage plant	.5 MGD	BOD, 5-day, 20 deg. C	maximum weekly average 25.5 mg/L, tighter	Nov 8, 2027	under 3 values	—
SHELBY POTW	MS0025089	MS	Sewage plant	.5 MGD	BOD, 5-day, 20 deg. C	maximum weekly average 106 lb/d, tighter	Nov 8, 2027	under 3 values	—
SHELBY POTW	MS0025089	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 5.7 lb/d, tighter	Nov 8, 2027	under 3 values	—
SHELBY POTW	MS0025089	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Nov 8, 2027	under 3 values	—
SHELBY POTW	MS0025089	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2 mg/L, tighter	Nov 8, 2027	under 3 values	—
SHELBY POTW	MS0025089	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 8.5 lb/d, tighter	Nov 8, 2027	under 3 values	—
LAFAYETTE COUNTY INDUSTRIAL PARK	MS0043079	MS	Sewage plant	.3 MGD	Nitrogen, ammonia total [as N]	monthly average 1.37 mg/L, tighter	Nov 19, 2027	1.282 mg/L (10 values)	0.936×
LAFAYETTE COUNTY INDUSTRIAL PARK	MS0043079	MS	Sewage plant	.3 MGD	Nitrogen, ammonia total [as N]	daily maximum 2.05 mg/L, tighter	Nov 19, 2027	1.42 mg/L (10 values)	0.693×
LAFAYETTE COUNTY INDUSTRIAL PARK	MS0043079	MS	Sewage plant	.3 MGD	Nitrogen, ammonia total [as N]	monthly average 3.43 lb/d, tighter	Nov 19, 2027	1.108 lb/d (10 values)	0.323×
LAFAYETTE COUNTY INDUSTRIAL PARK	MS0043079	MS	Sewage plant	.3 MGD	Nitrogen, ammonia total [as N]	daily maximum 5.15 lb/d, tighter	Nov 19, 2027	1.31 lb/d (10 values)	0.254×
SUMNER POTW	MS0035726	MS	Sewage plant	.389 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Nov 21, 2027	under 3 values	—
SUMNER POTW	MS0035726	MS	Sewage plant	.389 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 4.4 lb/d, tighter	Nov 21, 2027	under 3 values	—
SUMNER POTW	MS0035726	MS	Sewage plant	.389 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	Nov 21, 2027	under 3 values	—
SUMNER POTW	MS0035726	MS	Sewage plant	.389 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 6.7 lb/d, tighter	Nov 21, 2027	under 3 values	—
STATE LINE POTW	MS0035211	MS	Sewage plant	.15 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 3.8 lb/d, tighter	Nov 25, 2027	under 3 values	—
STATE LINE POTW	MS0035211	MS	Sewage plant	.15 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 5.6 lb/d, tighter	Nov 25, 2027	under 3 values	—
STATE LINE POTW	MS0035211	MS	Sewage plant	.15 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 4.5 mg/L, tighter	Nov 25, 2027	under 3 values	—
COLDWATER POTW, NORTH	MS0026964	MS	Sewage plant	.135 MGD	BOD, 5-day, 20 deg. C	maximum monthly average 5 mg/L, tighter	Dec 2, 2027	under 3 values	—
COLDWATER POTW, NORTH	MS0026964	MS	Sewage plant	.135 MGD	BOD, 5-day, 20 deg. C	maximum monthly average 5.6 lb/d, tighter	Dec 2, 2027	under 3 values	—
COLDWATER POTW, NORTH	MS0026964	MS	Sewage plant	.135 MGD	BOD, 5-day, 20 deg. C	maximum weekly average 8.4 lb/d, tighter	Dec 2, 2027	under 3 values	—
COLDWATER POTW, NORTH	MS0026964	MS	Sewage plant	.135 MGD	BOD, 5-day, 20 deg. C	maximum weekly average 7.5 mg/L, tighter	Dec 2, 2027	under 3 values	—
COLDWATER POTW, NORTH	MS0026964	MS	Sewage plant	.135 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Dec 2, 2027	under 3 values	—
COLDWATER POTW, NORTH	MS0026964	MS	Sewage plant	.135 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.54 lb/d, tighter	Dec 2, 2027	under 3 values	—
COLDWATER POTW, NORTH	MS0026964	MS	Sewage plant	.135 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.3 lb/d, tighter	Dec 2, 2027	under 3 values	—
COLDWATER POTW, NORTH	MS0026964	MS	Sewage plant	.135 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	Dec 2, 2027	under 3 values	—
MORTON POTW	MS0036234	MS	Sewage plant, major	2.97 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.1 mg/L, tighter	Dec 10, 2027	0.8 mg/L (11 values)	0.381×
MORTON POTW	MS0036234	MS	Sewage plant, major	2.97 MGD	Nitrogen, ammonia total [as N]	monthly average 1.39 mg/L, tighter	Dec 10, 2027	0.3595 mg/L (10 values)	0.259×
MORTON POTW	MS0036234	MS	Sewage plant, major	2.97 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 51.6 lb/d, tighter	Dec 10, 2027	6 lb/d (11 values)	0.116×
MORTON POTW	MS0036234	MS	Sewage plant, major	2.97 MGD	Nitrogen, ammonia total [as N]	monthly average 34.4 lb/d, tighter	Dec 10, 2027	3.7 lb/d (11 values)	0.108×
MORTON POTW	MS0036234	MS	Sewage plant, major	2.97 MGD	Chlorine, free available	monthly average 0.011 ug/L, tighter	Dec 10, 2027	under 3 values	—
MORTON POTW	MS0036234	MS	Sewage plant, major	2.97 MGD	Chlorine, free available	maximum weekly average 0.019 ug/L, tighter	Dec 10, 2027	under 3 values	—
LOUISVILLE POTW, SOUTH	MS0025836	MS	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Dec 30, 2027	under 3 values	—
LOUISVILLE POTW, SOUTH	MS0025836	MS	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 6.85 lb/d, tighter	Dec 30, 2027	under 3 values	—
LOUISVILLE POTW, SOUTH	MS0025836	MS	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 10.32 lb/d, tighter	Dec 30, 2027	under 3 values	—
LOUISVILLE POTW, SOUTH	MS0025836	MS	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	Dec 30, 2027	under 3 values	—
UNION POTW	MS0023744	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Dec 30, 2027	under 3 values	—
UNION POTW	MS0023744	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 5.71 lb/d, tighter	Dec 30, 2027	under 3 values	—
UNION POTW	MS0023744	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 8.57 lb/d, tighter	Dec 30, 2027	under 3 values	—
UNION POTW	MS0023744	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.06 mg/L, tighter	Dec 30, 2027	under 3 values	—
GREAT RIVER UTILITY OPERATING CO LLC, COLLEGE HILLS SUBDIVISION	MS0051764	MS	Industrial	.138 MGD	Nitrogen, ammonia total [as N]	daily maximum 2.37 lb/d, tighter	Jan 24, 2028	under 3 values	—
GREAT RIVER UTILITY OPERATING CO LLC, COLLEGE HILLS SUBDIVISION	MS0051764	MS	Industrial	.138 MGD	Nitrogen, ammonia total [as N]	daily maximum 2.05 ug/L, tighter	Jan 24, 2028	under 3 values	—
GREAT RIVER UTILITY OPERATING CO LLC, COLLEGE HILLS SUBDIVISION	MS0051764	MS	Industrial	.138 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 ug/L, tighter	Jan 24, 2028	under 3 values	—
GREAT RIVER UTILITY OPERATING CO LLC, COLLEGE HILLS SUBDIVISION	MS0051764	MS	Industrial	.138 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.58 lb/d, tighter	Jan 24, 2028	under 3 values	—
MCLAIN POTW	MS0035165	MS	Sewage plant	.036 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Feb 26, 2028	under 3 values	—
MCLAIN POTW	MS0035165	MS	Sewage plant	.036 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.41 lb/d, tighter	Feb 26, 2028	under 3 values	—
MCLAIN POTW	MS0035165	MS	Sewage plant	.036 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2 mg/L, tighter	Feb 26, 2028	under 3 values	—
MCLAIN POTW	MS0035165	MS	Sewage plant	.036 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 0.6 lb/d, tighter	Feb 26, 2028	under 3 values	—
SLEDGE POTW	MS0021016	MS	Sewage plant	.22 MGD	BOD, 5-day, 20 deg. C	maximum monthly average 17 mg/L, tighter	Mar 17, 2028	under 3 values	—
SLEDGE POTW	MS0021016	MS	Sewage plant	.22 MGD	BOD, 5-day, 20 deg. C	maximum monthly average 31.2 lb/d, tighter	Mar 17, 2028	under 3 values	—
SLEDGE POTW	MS0021016	MS	Sewage plant	.22 MGD	BOD, 5-day, 20 deg. C	maximum weekly average 25.5 mg/L, tighter	Mar 17, 2028	under 3 values	—
SLEDGE POTW	MS0021016	MS	Sewage plant	.22 MGD	BOD, 5-day, 20 deg. C	maximum weekly average 46.8 lb/d, tighter	Mar 17, 2028	under 3 values	—
DUNCAN POTW	MS0042234	MS	Sewage plant	.053 MGD	Nitrogen, total [as N]	maximum monthly average 4.95 lb/d, new	Mar 28, 2028	under 3 values	—
DUNCAN POTW	MS0042234	MS	Sewage plant	.053 MGD	Nitrogen, total [as N]	maximum weekly average 7.42 lb/d, new	Mar 28, 2028	under 3 values	—
DUNCAN POTW	MS0042234	MS	Sewage plant	.053 MGD	Phosphorus, total [as P]	maximum monthly average 2.43 lb/d, new	Mar 28, 2028	under 3 values	—
DUNCAN POTW	MS0042234	MS	Sewage plant	.053 MGD	Phosphorus, total [as P]	maximum weekly average 3.64 lb/d, new	Mar 28, 2028	under 3 values	—
NOXAPATER POTW, SOUTH	MS0021628	MS	Sewage plant	.06 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.68 lb/d, tighter	Apr 29, 2028	under 3 values	—
NOXAPATER POTW, SOUTH	MS0021628	MS	Sewage plant	.06 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Apr 29, 2028	under 3 values	—
NOXAPATER POTW, SOUTH	MS0021628	MS	Sewage plant	.06 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 1.02 lb/d, tighter	Apr 29, 2028	under 3 values	—
NOXAPATER POTW, SOUTH	MS0021628	MS	Sewage plant	.06 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	Apr 29, 2028	under 3 values	—
BOLTON POTW	MS0021032	MS	Sewage plant	.21 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 2.4 lb/d, tighter	May 14, 2028	under 3 values	—
BOLTON POTW	MS0021032	MS	Sewage plant	.21 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	May 14, 2028	under 3 values	—
BOLTON POTW	MS0021032	MS	Sewage plant	.21 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 3.6 lb/d, tighter	May 14, 2028	under 3 values	—
BOLTON POTW	MS0021032	MS	Sewage plant	.21 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.1 mg/L, tighter	May 14, 2028	under 3 values	—
COUNTRY OAKS LLC, COUNTRY OAKS MOBILE HOME PARK	MS0022250	MS	Industrial	.01 MGD	Nitrogen, ammonia total [as N]	daily maximum 2.5 lb/d, new	Jun 29, 2028	under 3 values	—
COUNTRY OAKS LLC, COUNTRY OAKS MOBILE HOME PARK	MS0022250	MS	Industrial	.01 MGD	Nitrogen, ammonia total [as N]	daily maximum 3 mg/L, new	Jun 29, 2028	under 3 values	—
COUNTRY OAKS LLC, COUNTRY OAKS MOBILE HOME PARK	MS0022250	MS	Industrial	.01 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.7 lb/d, new	Jun 29, 2028	under 3 values	—
COUNTRY OAKS LLC, COUNTRY OAKS MOBILE HOME PARK	MS0022250	MS	Industrial	.01 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 2 mg/L, new	Jun 29, 2028	under 3 values	—
DESOTO COUNTY REGIONAL UTILITY AUTHORITY, SHORT FORK WWTF	MS0062227	MS	Sewage plant, major	8 MGD	Nitrogen, ammonia total [as N]	monthly average 3.6 mg/L, tighter	Jun 30, 2028	2.27 mg/L (11 values)	0.631×
DESOTO COUNTY REGIONAL UTILITY AUTHORITY, SHORT FORK WWTF	MS0062227	MS	Sewage plant, major	8 MGD	Nitrogen, ammonia total [as N]	monthly average 240 lb/d, tighter	Jun 30, 2028	121.6 lb/d (11 values)	0.507×
DESOTO COUNTY REGIONAL UTILITY AUTHORITY, SHORT FORK WWTF	MS0062227	MS	Sewage plant, major	8 MGD	Nitrogen, ammonia total [as N]	weekly maximum 360 lb/d, tighter	Jun 30, 2028	under 3 values	—
DESOTO COUNTY REGIONAL UTILITY AUTHORITY, SHORT FORK WWTF	MS0062227	MS	Sewage plant, major	8 MGD	Nitrogen, ammonia total [as N]	weekly maximum 5.4 mg/L, tighter	Jun 30, 2028	under 3 values	—
STARKVILLE POTW	MS0036145	MS	Sewage plant, major	10 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Aug 31, 2028	under 3 values	—
FOREST POTW	MS0020362	MS	Sewage plant, major	4.9 MGD	Nitrogen, ammonia total [as N]	monthly average 1.37 mg/L, tighter	Sep 16, 2028	0.4 mg/L (12 values)	0.292×
FOREST POTW	MS0020362	MS	Sewage plant, major	4.9 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2 mg/L, tighter	Sep 16, 2028	0.55 mg/L (12 values)	0.275×
FOREST POTW	MS0020362	MS	Sewage plant, major	4.9 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 82 lb/d, tighter	Sep 16, 2028	13 lb/d (12 values)	0.159×
FOREST POTW	MS0020362	MS	Sewage plant, major	4.9 MGD	Nitrogen, ammonia total [as N]	monthly average 56 lb/d, tighter	Sep 16, 2028	7.9 lb/d (12 values)	0.141×
BROOKHAVEN POTW	MS0024147	MS	Sewage plant, major	3 MGD	Nitrogen, ammonia total [as N]	monthly average 1.4 mg/L, tighter	Mar 25, 2029	0.07 mg/L (11 values)	0.05×
BROOKHAVEN POTW	MS0024147	MS	Sewage plant, major	3 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.1 mg/L, tighter	Mar 25, 2029	0.1 mg/L (11 values)	0.0476×
BROOKHAVEN POTW	MS0024147	MS	Sewage plant, major	3 MGD	Nitrogen, ammonia total [as N]	monthly average 35 lb/d, tighter	Mar 25, 2029	1.2 lb/d (11 values)	0.0343×
BROOKHAVEN POTW	MS0024147	MS	Sewage plant, major	3 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 52 lb/d, tighter	Mar 25, 2029	1.3 lb/d (11 values)	0.025×
POPE SEWER DISTRICT, TOWN OF	MS0043630	MS	Sewage plant	.187 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 7 mg/L, tighter	Apr 6, 2029	under 3 values	—
POPE SEWER DISTRICT, TOWN OF	MS0043630	MS	Sewage plant	.187 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 10.9 lb/d, tighter	Apr 6, 2029	under 3 values	—
POPE SEWER DISTRICT, TOWN OF	MS0043630	MS	Sewage plant	.187 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 10.5 mg/L, tighter	Apr 6, 2029	under 3 values	—
POPE SEWER DISTRICT, TOWN OF	MS0043630	MS	Sewage plant	.187 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 16.3 lb/d, tighter	Apr 6, 2029	under 3 values	—
SUNNYHILL WATER ASSOCIATION	MS0044199	MS	Sewage plant	.04 MGD	Nitrogen, ammonia total [as N]	M1 3 mg/L, new	Apr 7, 2029	under 3 values	—
SUNNYHILL WATER ASSOCIATION	MS0044199	MS	Sewage plant	.04 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 2 mg/L, new	Apr 7, 2029	under 3 values	—
SUNNYHILL WATER ASSOCIATION	MS0044199	MS	Sewage plant	.04 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.66 lb/d, new	Apr 7, 2029	under 3 values	—
SUNNYHILL WATER ASSOCIATION	MS0044199	MS	Sewage plant	.04 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 1 lb/d, new	Apr 7, 2029	under 3 values	—
RAYMOND POTW	MS0051772	MS	Sewage plant	.15 MGD	Nitrogen, ammonia total [as N]	monthly average 1.37 mg/L, tighter	May 21, 2029	1.26 mg/L (11 values)	0.92×
RAYMOND POTW	MS0051772	MS	Sewage plant	.15 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2 mg/L, tighter	May 21, 2029	1.26 mg/L (11 values)	0.63×
RAYMOND POTW	MS0051772	MS	Sewage plant	.15 MGD	Nitrogen, ammonia total [as N]	monthly average 0.86 lb/d, tighter	May 21, 2029	0.43 lb/d (11 values)	0.5×
RAYMOND POTW	MS0051772	MS	Sewage plant	.15 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 1.3 lb/d, tighter	May 21, 2029	0.43 lb/d (11 values)	0.331×
LAUREL POTW, NUMBER 2	MS0020176	MS	Sewage plant, major	6.6 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.9 mg/L, tighter	May 28, 2029	1.44 mg/L (11 values)	0.497×
LAUREL POTW, NUMBER 2	MS0020176	MS	Sewage plant, major	6.6 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 157 lb/d, tighter	May 28, 2029	42.1 lb/d (11 values)	0.268×
LAUREL POTW, NUMBER 2	MS0020176	MS	Sewage plant, major	6.6 MGD	Nitrogen, ammonia total [as N]	monthly average 1.9 mg/L, tighter	May 28, 2029	0.32 mg/L (11 values)	0.168×
LAUREL POTW, NUMBER 2	MS0020176	MS	Sewage plant, major	6.6 MGD	Nitrogen, ammonia total [as N]	monthly average 105 lb/d, tighter	May 28, 2029	9.02 lb/d (11 values)	0.0859×
LAUREL POTW, NUMBER 1	MS0024163	MS	Sewage plant, major	7.4 MGD	Nitrogen, ammonia total [as N]	monthly average 1.8 mg/L (May–Oct), tighter	May 28, 2029	0.06 mg/L (5 values)	0.0333×
LAUREL POTW, NUMBER 1	MS0024163	MS	Sewage plant, major	7.4 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.7 mg/L (May–Oct), tighter	May 28, 2029	0.07 mg/L (5 values)	0.0259×
LAUREL POTW, NUMBER 1	MS0024163	MS	Sewage plant, major	7.4 MGD	Nitrogen, ammonia total [as N]	monthly average 111 lb/d (May–Oct), tighter	May 28, 2029	1.46 lb/d (5 values)	0.0132×
TUPELO POTW	MS0036111	MS	Sewage plant, major	10.5 MGD	Nitrogen, ammonia total [as N]	monthly average 1.4 mg/L, tighter	Jun 1, 2029	0.3 mg/L (11 values)	0.214×
TUPELO POTW	MS0036111	MS	Sewage plant, major	10.5 MGD	Nitrogen, ammonia total [as N]	monthly average 122.6 lb/d, tighter	Jun 1, 2029	15.5 lb/d (11 values)	0.126×
TUPELO POTW	MS0036111	MS	Sewage plant, major	10.5 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 2.1 mg/L, tighter	Jun 1, 2029	under 3 values	—
HARRISON CO UTILITY AUTHORITY, DELISLE WASTEWATER TREATMENT FACILITY	MS0052574	MS	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 9 lb/d, tighter	Jun 22, 2029	2.655 lb/d (4 values)	0.295×
HARRISON CO UTILITY AUTHORITY, DELISLE WASTEWATER TREATMENT FACILITY	MS0052574	MS	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 13 lb/d, tighter	Jun 22, 2029	2.656 lb/d (4 values)	0.204×
HARRISON CO UTILITY AUTHORITY, DELISLE WASTEWATER TREATMENT FACILITY	MS0052574	MS	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2 ug/L, tighter	Jun 22, 2029	2335 ug/L (4 values)	check the permit
WASTE WATER SOLUTIOINS LLC, THE MEADOWS SUBDIVISION	MS0055514	MS	Industrial	.038 MGD	BOD, 5-day, 20 deg. C	daily maximum 37.5 mg/L, tighter	Sep 29, 2029	under 3 values	—
WASTE WATER SOLUTIOINS LLC, THE MEADOWS SUBDIVISION	MS0055514	MS	Industrial	.038 MGD	BOD, 5-day, 20 deg. C	daily maximum 11.8 lb/d, tighter	Sep 29, 2029	under 3 values	—
WASTE WATER SOLUTIOINS LLC, THE MEADOWS SUBDIVISION	MS0055514	MS	Industrial	.038 MGD	BOD, 5-day, 20 deg. C	maximum monthly average 25 mg/L, tighter	Sep 29, 2029	under 3 values	—
WASTE WATER SOLUTIOINS LLC, THE MEADOWS SUBDIVISION	MS0055514	MS	Industrial	.038 MGD	BOD, 5-day, 20 deg. C	maximum monthly average 7.9 lb/d, tighter	Sep 29, 2029	under 3 values	—
WASTE WATER SOLUTIOINS LLC, THE MEADOWS SUBDIVISION	MS0055514	MS	Industrial	.038 MGD	Nitrogen, ammonia total [as N]	daily maximum 2.1 mg/L, tighter	Sep 29, 2029	under 3 values	—
WASTE WATER SOLUTIOINS LLC, THE MEADOWS SUBDIVISION	MS0055514	MS	Industrial	.038 MGD	Nitrogen, ammonia total [as N]	daily maximum 0.65 lb/d, tighter	Sep 29, 2029	under 3 values	—
WASTE WATER SOLUTIOINS LLC, THE MEADOWS SUBDIVISION	MS0055514	MS	Industrial	.038 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Sep 29, 2029	under 3 values	—
WASTE WATER SOLUTIOINS LLC, THE MEADOWS SUBDIVISION	MS0055514	MS	Industrial	.038 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.43 lb/d, tighter	Sep 29, 2029	under 3 values	—
JACKSON COUNTY UTILITY AUTHORITY, POTW 1C	MS0045446	MS	Sewage plant, major	5 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 120.8 lb/d, tighter	Dec 30, 2029	97.49 lb/d (11 values)	0.807×
WINONA POTW	MS0021024	MS	Sewage plant, major	1.2 MGD	Nitrogen, ammonia total [as N]	monthly average 15 lb/d, tighter	Apr 29, 2030	12.81 lb/d (9 values)	0.854×
WINONA POTW	MS0021024	MS	Sewage plant, major	1.2 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 22 lb/d, tighter	Apr 29, 2030	17.34 lb/d (9 values)	0.788×
LAKE LORMAN POTW	MS0043401	MS	Sewage plant	.064 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Apr 29, 2030	under 3 values	—
LAKE LORMAN POTW	MS0043401	MS	Sewage plant	.064 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.73 lb/d, tighter	Apr 29, 2030	under 3 values	—
LAKE LORMAN POTW	MS0043401	MS	Sewage plant	.064 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 1.09 lb/d, tighter	Apr 29, 2030	under 3 values	—
LAKE LORMAN POTW	MS0043401	MS	Sewage plant	.064 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2 mg/L, tighter	Apr 29, 2030	under 3 values	—

Each limit is one EPA's ICIS-NPDES file holds on the permit's current version with a begin date after today, enforceable and numeric, either on a parameter the outfall was never limited on (new) or lower than the limit in force (tighter). Today's median is the plant's own reported values for the same outfall, statistic and unit between Oct 1, 2025 and Sep 30, 2026, with how many; none is shown where most were below a detection limit. Read the permit before relying on a value.

Sell to these plants? The list for your states every week, with every plant over a limit on your pollutant, as a spreadsheet, by API and by email when a new one appears: ask for the plant list, or write to info@passage-data.com. What a seller gets.

For programs and AI agents: a state's permits with these limits as JSON at /api/v1/permits?state=MS&upcoming=true, narrowed with &facility_type=potw or &min_flow_mgd=1; the whole list at /dmr/data/upcoming.json; or add https://passage-data.com/mcp as a remote MCP server (tool list_permits). Free, no key. llms.txt

From EPA's ECHO data, not the permit document itself: your permit is the final word. All states

Plants facing new discharge limits — by state and pollutant