In Michigan: 53 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Jan 1, 2027 and Oct 1, 2029 (168 limits); 4 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
Federal-Mogul Powertrain LLC	MI0002836	MI	Industrial, major	—	Chlorine, total residual	daily maximum 38 ug/L, new	Oct 1, 2027	430 ug/L (11 values)	11.3×
City of Gladstone	MI0057676	MI	Sewage plant, major	—	Chlorine, total residual	daily maximum 38 ug/L, tighter	Dec 1, 2027	81 ug/L (11 values)	2.13×
Randall Foods Inc.	MI0028215	MI	Industrial	—	Temperature, water deg. fahrenheit	daily maximum 89 deg F, new	Oct 1, 2028	134.5 deg F (11 values)	1.51×
City of Adrian	MI0022152	MI	Sewage plant, major	—	Phosphorus, total [as P]	monthly average 0.8 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), tighter	Oct 1, 2028	0.875 mg/L (6 values)	1.09×
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1.6 mg/L (May–Sep), tighter	Jan 1, 2027	1.55 mg/L (4 values)	0.969×
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Perfluorooctanoic acid (PFOA)	daily maximum 40 ng/L, new	Jan 1, 2027	33.5 ng/L (10 values)	0.837×
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 4.2 mg/L (Jan, Feb, Mar, Dec), tighter	Jan 1, 2027	2.995 mg/L (4 values)	0.713×
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Perfluorooctanesulfonate	daily maximum 15 ng/L, new	Jan 1, 2027	8.3 ng/L (10 values)	0.553×
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 2 lb/d (May–Sep), tighter	Jan 1, 2027	0.45 lb/d (4 values)	0.225×
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 5.3 lb/d (Jan, Feb, Mar, Dec), tighter	Jan 1, 2027	0.59 lb/d (4 values)	0.111×
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Perfluorohexane Sulfonate	daily maximum 60 ng/L, new	Jan 1, 2027	6 ng/L (10 values)	0.1×
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Perfluorobutanesulfonic acid (PFBS)	daily maximum 250 ng/L, new	Jan 1, 2027	6.5 ng/L (10 values)	0.026×
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Cyanide [A]	monthly average 0.0065 lb/d, new	Jan 1, 2027	under 3 values	—
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Cyanide [A]	monthly average 5.2 ug/L, new	Jan 1, 2027	under 3 values	—
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Mercury, total [as Hg]	1D 0.0000025 lb/d, new	Jan 1, 2027	under 3 values	—
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Mercury, total [as Hg]	1D 2 ng/L, new	Jan 1, 2027	under 3 values	—
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Oct, Nov), tighter	Jan 1, 2027	under 3 values	—
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 3.8 lb/d (Oct, Nov), tighter	Jan 1, 2027	under 3 values	—
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Perfluorononanoic acid (PFNA)	daily maximum 26 ng/L, new	Jan 1, 2027	1.6 ng/L (10 values, 10 below detection)	—
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Perfluorooctanesulfonate	monthly average 12 ng/L, new	Jan 1, 2027	under 3 values	—
Kent County Department of Public Works	MI0037486	MI	Industrial	—	Perfluorooctanesulfonate	monthly average 0.000015 lb/d, new	Jan 1, 2027	under 3 values	—
City of Richmond	MI0023906	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 25 lb/d (Jan, Feb, Mar, Dec), tighter	Feb 1, 2027	under 3 values	—
City of Richmond	MI0023906	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 16 lb/d (Apr), tighter	Feb 1, 2027	under 3 values	—
Village of Fowlerville	MI0020664	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 5.5 mg/L (Jan, Feb, Dec), tighter	Jun 1, 2027	0.02 mg/L (3 values)	0.00364×
Village of Fowlerville	MI0020664	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 37 lb/d (Jan, Feb, Dec), tighter	Jun 1, 2027	0.1 lb/d (3 values)	0.0027×
Village of Fowlerville	MI0020664	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 57 lb/d (Mar, Apr), tighter	Jun 1, 2027	under 3 values	—
City of Leslie	MI0020796	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 11 lb/d (Oct, Nov), tighter	Jul 1, 2027	under 3 values	—
DTE Electric Company	MI0001953	MI	Industrial, major	—	Sulfide, dissolved, [as S]	daily maximum 19 lb/d (Oct, Nov), new	Aug 1, 2027	under 3 values	—
DTE Electric Company	MI0001953	MI	Industrial, major	—	Sulfide, dissolved, [as S]	daily maximum 400 ug/L (Oct, Nov), new	Aug 1, 2027	under 3 values	—
DTE Electric Company	MI0001953	MI	Industrial, major	—	Sulfide, dissolved, [as S]	daily maximum 370 ug/L (Jan, Feb, Mar, Dec), new	Aug 1, 2027	under 3 values	—
DTE Electric Company	MI0001953	MI	Industrial, major	—	Sulfide, dissolved, [as S]	daily maximum 18 lb/d (Jan, Feb, Mar, Dec), new	Aug 1, 2027	under 3 values	—
DTE Electric Company	MI0001953	MI	Industrial, major	—	Sulfide, dissolved, [as S]	daily maximum 410 ug/L (Apr), new	Aug 1, 2027	under 3 values	—
DTE Electric Company	MI0001953	MI	Industrial, major	—	Sulfide, dissolved, [as S]	daily maximum 20 lb/d (Apr), new	Aug 1, 2027	under 3 values	—
DTE Electric Company	MI0001953	MI	Industrial, major	—	Sulfide, dissolved, [as S]	daily maximum 490 ug/L (May–Sep), new	Aug 1, 2027	under 3 values	—
DTE Electric Company	MI0001953	MI	Industrial, major	—	Sulfide, dissolved, [as S]	daily maximum 23 lb/d (May–Sep), new	Aug 1, 2027	under 3 values	—
Haring Charter Township	MI0059076	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 19 lb/d (Apr, May), new	Aug 1, 2027	under 3 values	—
Haring Charter Township	MI0059076	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 17 mg/L (Apr, May), new	Aug 1, 2027	under 3 values	—
Haring Charter Township	MI0059076	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 14 mg/L (Jun–Sep), new	Aug 1, 2027	under 3 values	—
Haring Charter Township	MI0059076	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 16 lb/d (Jun–Sep), new	Aug 1, 2027	under 3 values	—
Pfizer Incorporated	MI0002941	MI	Industrial, major	—	Arsenic, total [as As]	monthly average 10 ug/L, new	Sep 1, 2027	8.6 ug/L (11 values)	0.86×
City of Trenton	MI0021164	MI	Sewage plant, major	—	Phosphorus, total [as P]	monthly average 0.8 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), tighter	Sep 1, 2027	0.665 mg/L (6 values)	0.831×
South Huron Valley Utility Authority	MI0043800	MI	Sewage plant, major	—	Phosphorus, total [as P]	monthly average 0.8 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), tighter	Sep 1, 2027	0.65 mg/L (6 values)	0.812×
City of Rockwood	MI0021181	MI	Sewage plant, major	—	Phosphorus, total [as P]	monthly average 0.8 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), tighter	Sep 1, 2027	0.55 mg/L (6 values)	0.688×
City of Tecumseh	MI0020583	MI	Sewage plant, major	—	Phosphorus, total [as P]	monthly average 0.8 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), tighter	Sep 1, 2027	0.491 mg/L (6 values)	0.614×
Pfizer Incorporated	MI0002941	MI	Industrial, major	—	Arsenic, total [as As]	monthly average 2.5 lb/d, new	Sep 1, 2027	0.73 lb/d (11 values)	0.292×
City of Tecumseh	MI0020583	MI	Sewage plant, major	—	Phosphorus, total [as P]	monthly average 11 lb/d (Jan, Feb, Mar, Oct, Nov, Dec), tighter	Sep 1, 2027	2.62 lb/d (6 values)	0.238×
City of Trenton	MI0021164	MI	Sewage plant, major	—	Phosphorus, total [as P]	monthly average 43 lb/d (Jan, Feb, Mar, Oct, Nov, Dec), tighter	Sep 1, 2027	9.5 lb/d (6 values)	0.221×
South Huron Valley Utility Authority	MI0043800	MI	Sewage plant, major	—	Phosphorus, total [as P]	monthly average 160 lb/d (Jan, Feb, Mar, Oct, Nov, Dec), tighter	Sep 1, 2027	33.5 lb/d (6 values)	0.209×
City of Rockwood	MI0021181	MI	Sewage plant, major	—	Phosphorus, total [as P]	monthly average 6.7 lb/d (Jan, Feb, Mar, Oct, Nov, Dec), tighter	Sep 1, 2027	1.1 lb/d (6 values)	0.164×
City of Imlay City	MI0023167	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 5 mg/L (Jan, Feb, Mar, Dec), tighter	Sep 1, 2027	0.09 mg/L (4 values)	0.018×
City of Imlay City	MI0023167	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 29 lb/d (Jan, Feb, Mar, Dec), tighter	Sep 1, 2027	0.25 lb/d (4 values)	0.00862×
City of Dowagiac	MI0022837	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 230 lb/d (Oct), tighter	Sep 1, 2027	under 3 values	—
City of Howell	MI0021113	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 60 lb/qtr (Apr), tighter	Sep 1, 2027	under 3 values	—
City of Howell	MI0021113	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 74 lb/qtr (Jan, Feb, Mar, Dec), tighter	Sep 1, 2027	under 3 values	—
City of Imlay City	MI0023167	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 29 lb/d (Apr), tighter	Sep 1, 2027	under 3 values	—
City of Imlay City	MI0023167	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 5 mg/L (Apr), tighter	Sep 1, 2027	under 3 values	—
Hemlock Semiconductor Operations LLC	MI0027375	MI	Industrial	—	Thermal Discharge	monthly average 3 MBTU/hr, new	Oct 1, 2027	0.3105 MBTU/hr (12 values)	0.103×
City of Adrian	MI0022152	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 7.7 mg/L (Jan, Feb, Dec), tighter	Oct 1, 2027	0.08 mg/L (3 values)	0.0104×
City of Adrian	MI0022152	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 450 lb/qtr (Jan, Feb, Dec), tighter	Oct 1, 2027	2 lb/qtr (3 values)	0.00444×
Billings Township	MI0055719	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly maximum 2.7 mg/L (Oct, Nov), tighter	Oct 1, 2027	under 3 values	—
City of Adrian	MI0022152	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 460 lb/qtr (Mar, Apr), tighter	Oct 1, 2027	under 3 values	—
City of Clare	MI0020176	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 70 lb/d (May–Sep), tighter	Oct 1, 2027	under 3 values	—
Monroe County Drain Commissioner	MI0020761	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 225 lb/qtr (Jan, Feb, Mar, Dec), tighter	Oct 1, 2027	under 3 values	—
Monroe County Drain Commissioner	MI0020761	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 185 lb/qtr (Apr), tighter	Oct 1, 2027	under 3 values	—
Thornton Farms Condominium Association	MI0056405	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 4.6 lb/d (Oct, Nov), tighter	Oct 1, 2027	under 3 values	—
Thornton Farms Condominium Association	MI0056405	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 3.8 mg/L (Oct, Nov), tighter	Oct 1, 2027	under 3 values	—
Mead Johnson Nutrition	MI0000175	MI	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 6.6 mg/L (Jan, Feb, Mar, Dec), tighter	Dec 1, 2027	5.05 mg/L (4 values)	0.765×
Mead Johnson Nutrition	MI0000175	MI	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 250 lb/d (Jan, Feb, Mar, Dec), tighter	Dec 1, 2027	45.35 lb/d (4 values)	0.181×
Mead Johnson Nutrition	MI0000175	MI	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 2 mg/L (May–Sep), tighter	Dec 1, 2027	0.115 mg/L (4 values)	0.0575×
Mead Johnson Nutrition	MI0000175	MI	Industrial, major	—	Solids, total suspended	daily maximum 1100 lb/d (May–Nov), tighter	Dec 1, 2027	38.5 lb/d (6 values)	0.035×
Mead Johnson Nutrition	MI0000175	MI	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 75 lb/d (May–Sep), tighter	Dec 1, 2027	1.85 lb/d (4 values)	0.0247×
Mead Johnson Nutrition	MI0000175	MI	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 3 mg/L (Apr), tighter	Dec 1, 2027	under 3 values	—
Mead Johnson Nutrition	MI0000175	MI	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 113 lb/d (Apr), tighter	Dec 1, 2027	under 3 values	—
Mead Johnson Nutrition	MI0000175	MI	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 2.5 mg/L (Oct, Nov), tighter	Dec 1, 2027	under 3 values	—
Mead Johnson Nutrition	MI0000175	MI	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 94 lb/d (Oct, Nov), tighter	Dec 1, 2027	under 3 values	—
City of South Lyon	MI0020273	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 1.7 mg/L (Jan, Feb, Mar, Dec), tighter	Jan 1, 2028	0.06 mg/L (4 values)	0.0353×
City of South Lyon	MI0020273	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 35 lb/d (Jan, Feb, Mar, Dec), tighter	Jan 1, 2028	0.666 lb/d (4 values)	0.019×
City of South Lyon	MI0020273	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 1.2 mg/L (Apr), tighter	Jan 1, 2028	under 3 values	—
City of South Lyon	MI0020273	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 25 lb/d (Apr), tighter	Jan 1, 2028	under 3 values	—
Michigan Milk Producers Association	MI0001414	MI	Industrial	—	Phosphorus, total [as P]	monthly average 3.3 lb/d, tighter	Mar 1, 2028	3.01 lb/d (10 values)	0.912×
Lake Leslie Sanitary System Drain Drainage District	MI0059156	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1.9 lb/d (Jan, Feb, Dec), tighter	Mar 1, 2028	under 3 values	—
Foremost Farms USA, Cooperative	MI0060382	MI	Industrial	—	pH	daily maximum 9 SU, new	Apr 1, 2028	6.02 SU (5 values)	0.669×
City of Pinconning	MI0020711	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 2.9 mg/L (Jan, Feb, Mar, Dec), tighter	May 1, 2028	0.135 mg/L (4 values)	0.0466×
City of Pinconning	MI0020711	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 12 lb/d (Jan, Feb, Mar, Dec), tighter	May 1, 2028	0.185 lb/d (4 values)	0.0154×
City of Pinconning	MI0020711	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 13 mg/L (Apr), tighter	May 1, 2028	under 3 values	—
City of Pinconning	MI0020711	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 54 lb/d (Apr), tighter	May 1, 2028	under 3 values	—
City of Norway	MI0020214	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 7.9 mg/L (Jan, Feb, Mar, Apr, Dec), tighter	Jun 1, 2028	0.72 mg/L (5 values)	0.0911×
City of Norway	MI0020214	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 33 lb/d (Jan, Feb, Mar, Apr, Dec), tighter	Jun 1, 2028	1.02 lb/d (5 values)	0.0309×
City of Norway	MI0020214	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 3.5 mg/L (May, Jun), tighter	Jun 1, 2028	under 3 values	—
City of Norway	MI0020214	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 15 lb/d (May, Jun), tighter	Jun 1, 2028	under 3 values	—
City of Norway	MI0020214	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 3.5 mg/L (Sep–Nov), tighter	Jun 1, 2028	under 3 values	—
City of Norway	MI0020214	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 9.6 lb/d (Jul, Aug), tighter	Jun 1, 2028	under 3 values	—
City of Norway	MI0020214	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 2.3 mg/L (Jul, Aug), tighter	Jun 1, 2028	under 3 values	—
Charter Township of Washington	MI0059299	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 3.1 mg/L (Jan, Feb, Mar, Dec), tighter	Aug 1, 2028	0.06 mg/L (4 values)	0.0194×
Charter Township of Washington	MI0059299	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 6.5 lb/d (Jan, Feb, Mar, Dec), tighter	Aug 1, 2028	0.0145 lb/d (4 values)	0.00223×
Charter Township of Washington	MI0059299	MI	Industrial	—	Nitrogen, ammonia total [as N]	7-day average 23 lb/d (Oct, Nov), tighter	Aug 1, 2028	under 3 values	—
Charter Township of Washington	MI0059299	MI	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 11 mg/L (Oct, Nov), tighter	Aug 1, 2028	under 3 values	—
Charter Township of Washington	MI0059299	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1.5 lb/d (May–Sep), tighter	Aug 1, 2028	under 3 values	—
Charter Township of Washington	MI0059299	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1.4 mg/L (Oct, Nov), tighter	Aug 1, 2028	under 3 values	—
Charter Township of Washington	MI0059299	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 2.9 lb/d (Oct, Nov), tighter	Aug 1, 2028	under 3 values	—
Charter Township of Washington	MI0059299	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 9 lb/d (Apr), tighter	Aug 1, 2028	under 3 values	—
Charter Township of Washington	MI0059299	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 4.3 mg/L (Apr), tighter	Aug 1, 2028	under 3 values	—
Leoni Township	MI0045942	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 4 mg/L (Jan, Feb, Mar, Dec), tighter	Sep 1, 2028	0.335 mg/L (4 values)	0.0837×
Leoni Township	MI0045942	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 100 lb/d (Jan, Feb, Mar, Dec), tighter	Sep 1, 2028	4.895 lb/d (4 values)	0.049×
Leoni Township	MI0045942	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	7-day average 425 lb/d (Jan, Feb, Mar, Dec), tighter	Sep 1, 2028	4.97 lb/d (4 values)	0.0117×
City of Bronson	MI0020729	MI	Sewage plant	—	Perfluorooctanesulfonate	monthly average 12 ng/L, new	Sep 1, 2028	under 3 values	—
City of Bronson	MI0020729	MI	Sewage plant	—	Perfluorooctanesulfonate	monthly average 0.00005 lb/d, new	Sep 1, 2028	under 3 values	—
City of Grand Rapids	MI0026069	MI	Sewage plant, major	—	Perfluorooctanesulfonate	monthly average 0.006 lb/d, new	Sep 1, 2028	under 3 values	—
City of Grand Rapids	MI0026069	MI	Sewage plant, major	—	Perfluorooctanesulfonate	monthly average 12 ng/L, new	Sep 1, 2028	under 3 values	—
City of Marysville	MI0020656	MI	Sewage plant, major	—	Perfluorooctanesulfonate	monthly average 11 ng/L, new	Sep 1, 2028	under 3 values	—
City of Marysville	MI0020656	MI	Sewage plant, major	—	Perfluorooctanesulfonate	monthly average 0.00033 lb/d, new	Sep 1, 2028	under 3 values	—
City of Sandusky	MI0020222	MI	Sewage plant	—	Perfluorooctanesulfonate	monthly average 0.000095 lb/d, new	Sep 1, 2028	under 3 values	—
City of Sandusky	MI0020222	MI	Sewage plant	—	Perfluorooctanesulfonate	monthly average 12 ng/L, new	Sep 1, 2028	under 3 values	—
Leoni Township	MI0045942	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	7-day average 375 lb/d (Apr), tighter	Sep 1, 2028	under 3 values	—
Leoni Township	MI0045942	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 4.1 mg/L (Apr), tighter	Sep 1, 2028	under 3 values	—
Leoni Township	MI0045942	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 100 lb/d (Apr), tighter	Sep 1, 2028	under 3 values	—
Amrize Cement Inc.	MI0001988	MI	Industrial, major	—	Temperature, water deg. fahrenheit	daily maximum 100 deg F, new	Oct 1, 2028	73.1 deg F (11 values)	0.731×
City of Adrian	MI0022152	MI	Sewage plant, major	—	Phosphorus, total [as P]	monthly average 47 lb/qtr (Jan, Feb, Mar, Oct, Nov, Dec), tighter	Oct 1, 2028	23 lb/qtr (6 values)	0.489×
Clinton River Water Resources Recovery Facility Drainage District	MI0023825	MI	Sewage plant, major	—	BOD, carbonaceous [5 day, 20 C]	daily maximum 21 mg/L (Jan, Feb, Mar, Dec), tighter	Oct 1, 2028	5.15 mg/L (4 values)	0.245×
Clinton River Water Resources Recovery Facility Drainage District	MI0023825	MI	Sewage plant, major	—	BOD, carbonaceous [5 day, 20 C]	monthly average 14 mg/L (Jan, Feb, Mar, Dec), tighter	Oct 1, 2028	2.95 mg/L (4 values)	0.211×
Clinton River Water Resources Recovery Facility Drainage District	MI0023825	MI	Sewage plant, major	—	BOD, carbonaceous [5 day, 20 C]	monthly average 3600 lb/d (Jan, Feb, Mar, Dec), tighter	Oct 1, 2028	341.5 lb/d (4 values)	0.0949×
Clinton River Water Resources Recovery Facility Drainage District	MI0023825	MI	Sewage plant, major	—	BOD, carbonaceous [5 day, 20 C]	7-day average 5400 lb/d (Jan, Feb, Mar, Dec), tighter	Oct 1, 2028	429.6 lb/d (4 values)	0.0796×
City of Bronson	MI0020729	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	daily maximum 5.5 mg/L (Apr), tighter	Oct 1, 2028	under 3 values	—
City of Bronson	MI0020729	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	daily maximum 2.1 mg/L (Oct, Nov), tighter	Oct 1, 2028	under 3 values	—
City of Bronson	MI0020729	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 13 lb/d (Apr), tighter	Oct 1, 2028	under 3 values	—
City of Bronson	MI0020729	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 8.3 lb/d (Oct, Nov), tighter	Oct 1, 2028	under 3 values	—
City of Gladwin	MI0023001	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 106 lb/d (Jul, Aug), new	Oct 1, 2028	under 3 values	—
City of Gladwin	MI0023001	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 19.5 mg/L (Jul, Aug), new	Oct 1, 2028	under 3 values	—
City of St. Johns	MI0026468	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 7.9 lb/d (May–Oct), tighter	Oct 1, 2028	under 3 values	—
City of St. Johns	MI0026468	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 65 lb/d (Jan, Feb, Mar, Dec), tighter	Oct 1, 2028	under 3 values	—
City of St. Johns	MI0026468	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 41 lb/d (Apr), tighter	Oct 1, 2028	under 3 values	—
Ed Scheffler	MI0027669	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly maximum 7.6 mg/L (Jan, Feb, Mar, Dec), tighter	Oct 1, 2028	under 3 values	—
Mead Johnson Nutrition	MI0000175	MI	Industrial, major	—	Thermal Discharge	monthly average 7.8 MBTU/hr (Jan, Feb, Mar, Apr, Oct, Nov, Dec), new	Oct 1, 2028	under 3 values	—
Tawas Utilities Authority	MI0021091	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 4.5 mg/L (Jun–Aug), tighter	Dec 1, 2028	0.14 mg/L (3 values)	0.0311×
Tawas Utilities Authority	MI0021091	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 90 lb/d (Jun–Aug), tighter	Dec 1, 2028	0.7 lb/d (3 values)	0.00778×
City of Milan	MI0021571	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly maximum 13 mg/L (Apr), tighter	Feb 1, 2029	under 3 values	—
Genesee County Division of Water & Waste Services	MI0022993	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 4.7 mg/L (Jan, Feb, Mar, Nov, Dec), tighter	Apr 1, 2029	1.1 mg/L (5 values)	0.234×
Genesee County Division of Water & Waste Services	MI0022993	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 430 lb/d (Jan, Feb, Mar, Nov, Dec), tighter	Apr 1, 2029	43 lb/d (5 values)	0.1×
Genesee County Division of Water & Waste Services	MI0022993	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 6 mg/L (Apr), tighter	Apr 1, 2029	under 3 values	—
Genesee County Division of Water & Waste Services	MI0022993	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 550 lb/d (Apr), tighter	Apr 1, 2029	under 3 values	—
Genesee County Division of Water & Waste Services	MI0022993	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 1.9 mg/L (May), tighter	Apr 1, 2029	under 3 values	—
Genesee County Division of Water & Waste Services	MI0022993	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 170 lb/d (May), tighter	Apr 1, 2029	under 3 values	—
City of Au Gres WWTP	MI0058794	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 11 mg/L (Jun–Aug), tighter	Jun 1, 2029	under 3 values	—
City of Au Gres WWTP	MI0058794	MI	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 37 lb/d (Jun–Aug), tighter	Jun 1, 2029	under 3 values	—
Village of Dundee WWTP	MI0020401	MI	Sewage plant, major	—	Phosphorus, total [as P]	monthly average 0.8 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), tighter	Sep 1, 2029	0.55 mg/L (6 values)	0.688×
Clinton River Water Resources Recovery Facility Drainage District	MI0023825	MI	Sewage plant, major	—	Perfluorooctanesulfonate	monthly average 12 ng/L, new	Sep 1, 2029	4.1 ng/L (11 values)	0.342×
Village of Dundee WWTP	MI0020401	MI	Sewage plant, major	—	Phosphorus, total [as P]	monthly average 10 lb/d (Jan, Feb, Mar, Oct, Nov, Dec), tighter	Sep 1, 2029	3.1 lb/d (6 values)	0.31×
Clinton River Water Resources Recovery Facility Drainage District	MI0023825	MI	Sewage plant, major	—	Perfluorooctanesulfonate	monthly average 0.0031 lb/d, new	Sep 1, 2029	0.000484 lb/d (11 values)	0.156×
Marquette County	MI0021423	MI	Sewage plant	—	Perfluorooctanesulfonate	monthly average 0.0008 lb/d, new	Sep 1, 2029	0.00001101 lb/d (7 values)	0.0138×
Gogebic-Iron Wastewater Authority	MI0020125	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 5.1 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), tighter	Sep 1, 2029	0.025 mg/L (6 values)	0.0049×
Gogebic-Iron Wastewater Authority	MI0020125	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 140 lb/d (Jan, Feb, Mar, Oct, Nov, Dec), tighter	Sep 1, 2029	0.3 lb/d (6 values)	0.00214×
City of Au Gres WWTP	MI0058794	MI	Industrial	—	Perfluorooctanesulfonate	monthly average 0.00004 lb/d, new	Sep 1, 2029	under 3 values	—
City of Au Gres WWTP	MI0058794	MI	Industrial	—	Perfluorooctanesulfonate	monthly average 12 ng/L, new	Sep 1, 2029	under 3 values	—
City of Marshall	MI0023540	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 215 lb/d (Jul, Aug), tighter	Sep 1, 2029	under 3 values	—
Marquette County	MI0021423	MI	Sewage plant	—	Perfluorooctanesulfonate	monthly average 12 ng/L, new	Sep 1, 2029	3400000 ng/L (7 values)	check the permit
Muskegon County Board of Public Works	MI0027391	MI	Sewage plant, major	—	Perfluorooctanesulfonate	monthly average 0.0043 lb/d, new	Sep 1, 2029	under 3 values	—
Muskegon County Board of Public Works	MI0027391	MI	Sewage plant, major	—	Perfluorooctanesulfonate	monthly average 12 ng/L, new	Sep 1, 2029	under 3 values	—
City of Dexter	MI0022829	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 7.6 mg/L (May–Sep), tighter	Oct 1, 2029	0.3 mg/L (4 values)	0.0395×
Clinton River Water Resources Recovery Facility Drainage District	MI0023825	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	daily maximum 8.5 mg/L (Jan, Feb, Mar, Dec), tighter	Oct 1, 2029	0.31 mg/L (4 values)	0.0365×
Clinton River Water Resources Recovery Facility Drainage District	MI0023825	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 4.2 mg/L (Jan, Feb, Mar, Dec), tighter	Oct 1, 2029	0.045 mg/L (4 values, 1 below detection)	0.0107×
Clinton River Water Resources Recovery Facility Drainage District	MI0023825	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 1100 lb/d (Jan, Feb, Mar, Dec), tighter	Oct 1, 2029	5.7 lb/d (4 values, 1 below detection)	0.00518×
Clinton River Water Resources Recovery Facility Drainage District	MI0023825	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	7-day average 2200 lb/d (Jan, Feb, Mar, Dec), tighter	Oct 1, 2029	10.05 lb/d (4 values)	0.00457×
City of Dexter	MI0022829	MI	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 37 lb/d (May–Sep), tighter	Oct 1, 2029	0.009852 lb/d (4 values)	0.000266×
City of Albion	MI0022161	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 210 lb/d (May–Sep), tighter	Oct 1, 2029	under 3 values	—
Clinton River Water Resources Recovery Facility Drainage District	MI0023825	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 3.2 mg/L (Apr), tighter	Oct 1, 2029	under 3 values	—
Clinton River Water Resources Recovery Facility Drainage District	MI0023825	MI	Sewage plant, major	—	Nitrogen, ammonia total [as N]	monthly average 820 lb/d (Apr), tighter	Oct 1, 2029	under 3 values	—
Huron Inc.	MI0002429	MI	Industrial	—	Thermal Discharge	monthly average 0.17 MBTU/hr, new	Oct 1, 2029	under 3 values	—
Huron Inc.	MI0002429	MI	Industrial	—	Thermal Discharge	monthly average 0.087 MBTU/hr, new	Oct 1, 2029	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=MI&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