In Ohio, for Nitrogen, ammonia total [as N]: 40 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Nov 1, 2026 and May 1, 2030 (241 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 90 · LA 80 · MS 63 · MD 45 · PA 45 · OH 40 · MI 33 · VA 33 · GA 22 · SC 8 · NE 7 · NY 7 · TX 7 · IN 6 · KS 6 · MO 5 · UT 5 · OR 4 · SD 4 · TN 4 · IL 3 · AR 2 · MN 2 · NJ 2 · NM 2 · CO 1

Plant	Permit	State	Type	Design flow	Parameter	New limit	Effective	Today's median	× limit
Erie Co Dept of Environmental Services	OH0053082	OH	Sewage plant, major	2.4 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (May–Oct), new	Jan 1, 2027	6.64 mg/L (5 values)	6.64×
Erie Co Dept of Environmental Services	OH0053082	OH	Sewage plant, major	2.4 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Jan 1, 2027	4.95 mg/L (6 values)	1.65×
Elida, Village of	OH0024996	OH	Sewage plant	.8 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Apr 1, 2027	15.26 mg/L (6 values)	5.09×
Village of Columbus Grove WWTP	OH0024759	OH	Sewage plant	.82 MGD	Nitrogen, ammonia total [as N]	monthly average 0.86 mg/L, tighter	Apr 1, 2027	1.06 mg/L (11 values)	1.23×
Village of Columbus Grove WWTP	OH0024759	OH	Sewage plant	.82 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.29 mg/L, tighter	Apr 1, 2027	1.54 mg/L (11 values)	1.19×
Village of Antwerp WWTP	OH0022195	OH	Sewage plant	.33 MGD	Nitrogen, ammonia total [as N]	monthly average 0.46 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Aug 1, 2029	25.7 mg/L (6 values)	55.9×
Village of Antwerp WWTP	OH0022195	OH	Sewage plant	.33 MGD	Nitrogen, ammonia total [as N]	monthly average 0.2 mg/L (May–Oct), new	Aug 1, 2029	7.38 mg/L (5 values)	36.9×
North Lewisburg, Village of	OH0023582	OH	Sewage plant	.42 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.42 mg/L (May–Oct), tighter	Nov 1, 2026	0.2 mg/L (4 values)	0.476×
North Lewisburg, Village of	OH0023582	OH	Sewage plant	.42 MGD	Nitrogen, ammonia total [as N]	monthly average 0.28 mg/L (May–Oct), tighter	Nov 1, 2026	0.095 mg/L (4 values)	0.339×
North Lewisburg, Village of	OH0023582	OH	Sewage plant	.42 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.67 kg/d (May–Oct), tighter	Nov 1, 2026	0.0875 kg/d (4 values)	0.131×
Mahoning County Commissioners	OH0024325	OH	Sewage plant, major	1.9 MGD	Nitrogen, ammonia total [as N]	monthly average 6.7 mg/L (May–Oct), new	Nov 1, 2026	0.643 mg/L (5 values)	0.096×
North Lewisburg, Village of	OH0023582	OH	Sewage plant	.42 MGD	Nitrogen, ammonia total [as N]	monthly average 0.45 kg/d (May–Oct), tighter	Nov 1, 2026	0.0375 kg/d (4 values)	0.0833×
Mahoning County Commissioners	OH0024325	OH	Sewage plant, major	1.9 MGD	Nitrogen, ammonia total [as N]	monthly average 48.2 kg/d (May–Oct), new	Nov 1, 2026	under 3 values	—
Mahoning County Commissioners	OH0024325	OH	Sewage plant, major	1.9 MGD	Nitrogen, ammonia total [as N]	weekly maximum 72.6 kg/d (May–Oct), new	Nov 1, 2026	under 3 values	—
Mahoning County Commissioners	OH0024325	OH	Sewage plant, major	1.9 MGD	Nitrogen, ammonia total [as N]	weekly maximum 10.1 mg/L (May–Oct), new	Nov 1, 2026	under 3 values	—
Waynesfield, Village of	OH0028029	OH	Sewage plant	.123 MGD	Nitrogen, ammonia total [as N]	weekly maximum 2.4 mg/L (May–Oct), tighter	Dec 1, 2026	0.49 mg/L (4 values)	0.204×
Waynesfield, Village of	OH0028029	OH	Sewage plant	.123 MGD	Nitrogen, ammonia total [as N]	monthly average 0.74 kg/d (May–Oct), tighter	Dec 1, 2026	0.13 kg/d (4 values)	0.176×
Waynesfield, Village of	OH0028029	OH	Sewage plant	.123 MGD	Nitrogen, ammonia total [as N]	monthly average 1.6 mg/L (May–Oct), tighter	Dec 1, 2026	0.25 mg/L (4 values)	0.156×
Waynesfield, Village of	OH0028029	OH	Sewage plant	.123 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.1 kg/d (May–Oct), tighter	Dec 1, 2026	0.17 kg/d (4 values)	0.155×
Madison Road Enterprise	OH0151748	OH	Industrial	.004 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Mar, Dec), new	Dec 1, 2026	under 3 values	—
Madison Road Enterprise	OH0151748	OH	Industrial	.004 MGD	Nitrogen, ammonia total [as N]	monthly average 0.045 kg/d (Mar, Dec), new	Dec 1, 2026	under 3 values	—
Madison Road Enterprise	OH0151748	OH	Industrial	.004 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (Jun, Aug), new	Dec 1, 2026	under 3 values	—
Madison Road Enterprise	OH0151748	OH	Industrial	.004 MGD	Nitrogen, ammonia total [as N]	monthly average 0.015 kg/d (Jun, Aug), new	Dec 1, 2026	under 3 values	—
Madison Road Enterprise	OH0151748	OH	Industrial	.004 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.068 kg/d (Mar, Dec), new	Dec 1, 2026	under 3 values	—
Madison Road Enterprise	OH0151748	OH	Industrial	.004 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Mar, Dec), new	Dec 1, 2026	under 3 values	—
Madison Road Enterprise	OH0151748	OH	Industrial	.004 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.023 kg/d (Jun, Aug), new	Dec 1, 2026	under 3 values	—
Madison Road Enterprise	OH0151748	OH	Industrial	.004 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (Jun, Aug), new	Dec 1, 2026	under 3 values	—
Village of Saint Paris	OH0021806	OH	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.4 mg/L (May–Oct), tighter	Jan 1, 2027	0.7 mg/L (5 values)	0.5×
Village of Saint Paris	OH0021806	OH	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	monthly average 0.91 mg/L (May–Oct), tighter	Jan 1, 2027	0.39 mg/L (5 values)	0.429×
Perrysburg, City of	OH0021008	OH	Sewage plant, major	8 MGD	Nitrogen, ammonia total [as N]	weekly maximum 2.7 mg/L (May–Oct), tighter	Jan 1, 2027	0.47 mg/L (5 values)	0.174×
Village of Saint Paris	OH0021806	OH	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	weekly maximum 2.6 kg/d (May–Oct), tighter	Jan 1, 2027	0.45 kg/d (5 values)	0.173×
Village of Saint Paris	OH0021806	OH	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	monthly average 1.7 kg/d (May–Oct), tighter	Jan 1, 2027	0.27 kg/d (5 values)	0.159×
Perrysburg, City of	OH0021008	OH	Sewage plant, major	8 MGD	Nitrogen, ammonia total [as N]	monthly average 1.8 mg/L (May–Oct), tighter	Jan 1, 2027	0.26 mg/L (5 values)	0.144×
Perrysburg, City of	OH0021008	OH	Sewage plant, major	8 MGD	Nitrogen, ammonia total [as N]	weekly maximum 82 kg/d (May–Oct), tighter	Jan 1, 2027	8.3 kg/d (5 values)	0.101×
Perrysburg, City of	OH0021008	OH	Sewage plant, major	8 MGD	Nitrogen, ammonia total [as N]	monthly average 55 kg/d (May–Oct), tighter	Jan 1, 2027	4.4 kg/d (5 values)	0.08×
Erie Co Dept of Environmental Services	OH0053082	OH	Sewage plant, major	2.4 MGD	Nitrogen, ammonia total [as N]	monthly average 27 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Jan 1, 2027	under 3 values	—
Erie Co Dept of Environmental Services	OH0053082	OH	Sewage plant, major	2.4 MGD	Nitrogen, ammonia total [as N]	monthly average 9.1 kg/d (May–Oct), new	Jan 1, 2027	under 3 values	—
Erie Co Dept of Environmental Services	OH0053082	OH	Sewage plant, major	2.4 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Jan 1, 2027	under 3 values	—
Erie Co Dept of Environmental Services	OH0053082	OH	Sewage plant, major	2.4 MGD	Nitrogen, ammonia total [as N]	weekly maximum 41 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Jan 1, 2027	under 3 values	—
Erie Co Dept of Environmental Services	OH0053082	OH	Sewage plant, major	2.4 MGD	Nitrogen, ammonia total [as N]	weekly maximum 14 kg/d (May–Oct), new	Jan 1, 2027	under 3 values	—
Erie Co Dept of Environmental Services	OH0053082	OH	Sewage plant, major	2.4 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (May–Oct), new	Jan 1, 2027	under 3 values	—
New London Hills Water Reclamation Facility	OH0118826	OH	Industrial	.02 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (May–Oct), tighter	Jan 1, 2027	under 3 values	—
New London Hills Water Reclamation Facility	OH0118826	OH	Industrial	.02 MGD	Nitrogen, ammonia total [as N]	monthly average 0.076 kg/d (May–Oct), tighter	Jan 1, 2027	under 3 values	—
New London Hills Water Reclamation Facility	OH0118826	OH	Industrial	.02 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (May–Oct), tighter	Jan 1, 2027	under 3 values	—
New London Hills Water Reclamation Facility	OH0118826	OH	Industrial	.02 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.11 kg/d (May–Oct), tighter	Jan 1, 2027	under 3 values	—
Village of Columbus Grove WWTP	OH0024759	OH	Sewage plant	.82 MGD	Nitrogen, ammonia total [as N]	monthly average 2.7 kg/d, tighter	Apr 1, 2027	0.78 kg/d (11 values)	0.289×
Village of Columbus Grove WWTP	OH0024759	OH	Sewage plant	.82 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4 kg/d, tighter	Apr 1, 2027	1.11 kg/d (11 values)	0.278×
Jackson Center, Village of	OH0025861	OH	Sewage plant	.37 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.3 kg/d (May–Oct), tighter	Apr 1, 2027	0.18 kg/d (3 values)	0.138×
Elida, Village of	OH0024996	OH	Sewage plant	.8 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (May–Oct), new	Apr 1, 2027	0.13 mg/L (5 values)	0.13×
Jackson Center, Village of	OH0025861	OH	Sewage plant	.37 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.9 mg/L (May–Oct), tighter	Apr 1, 2027	0.1 mg/L (3 values)	0.111×
Jackson Center, Village of	OH0025861	OH	Sewage plant	.37 MGD	Nitrogen, ammonia total [as N]	monthly average 0.6 mg/L (May–Oct), tighter	Apr 1, 2027	0.053 mg/L (3 values)	0.0883×
Jackson Center, Village of	OH0025861	OH	Sewage plant	.37 MGD	Nitrogen, ammonia total [as N]	monthly average 0.84 kg/d (May–Oct), tighter	Apr 1, 2027	0.048 kg/d (3 values)	0.0571×
Elida, Village of	OH0024996	OH	Sewage plant	.8 MGD	Nitrogen, ammonia total [as N]	monthly average 3 kg/d (May–Oct), new	Apr 1, 2027	under 3 values	—
Elida, Village of	OH0024996	OH	Sewage plant	.8 MGD	Nitrogen, ammonia total [as N]	monthly average 9.1 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Apr 1, 2027	under 3 values	—
Elida, Village of	OH0024996	OH	Sewage plant	.8 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (May–Oct), new	Apr 1, 2027	under 3 values	—
Elida, Village of	OH0024996	OH	Sewage plant	.8 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 kg/d (May–Oct), new	Apr 1, 2027	under 3 values	—
Elida, Village of	OH0024996	OH	Sewage plant	.8 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Apr 1, 2027	under 3 values	—
Elida, Village of	OH0024996	OH	Sewage plant	.8 MGD	Nitrogen, ammonia total [as N]	weekly maximum 14 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Apr 1, 2027	under 3 values	—
Eaton Homes WWTP	OH0026140	OH	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	monthly average 1.4 mg/L (May–Oct), tighter	May 1, 2027	0.12 mg/L (5 values)	0.0857×
Eaton Homes WWTP	OH0026140	OH	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	weekly maximum 2.1 mg/L (May–Oct), tighter	May 1, 2027	0.13 mg/L (5 values)	0.0619×
Eaton Homes WWTP	OH0026140	OH	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	monthly average 1.06 kg/d (May–Oct), tighter	May 1, 2027	0.064 kg/d (5 values)	0.0604×
Eaton Homes WWTP	OH0026140	OH	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.59 kg/d (May–Oct), tighter	May 1, 2027	0.091 kg/d (5 values)	0.0572×
Eaton Homes WWTP	OH0026140	OH	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	monthly average 3.7 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	May 1, 2027	0.105 mg/L (6 values)	0.0284×
Eaton Homes WWTP	OH0026140	OH	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	weekly maximum 5.6 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	May 1, 2027	0.125 mg/L (6 values)	0.0223×
Eaton Homes WWTP	OH0026140	OH	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.24 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), tighter	May 1, 2027	0.066 kg/d (6 values)	0.0156×
Eaton Homes WWTP	OH0026140	OH	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	monthly average 2.8 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), tighter	May 1, 2027	0.042 kg/d (6 values)	0.015×
Lima Refining Company	OH0002623	OH	Industrial, major	—	Nitrogen, ammonia total [as N]	monthly average 5.77 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Jun 1, 2027	1.385 mg/L (6 values)	0.24×
Lima Refining Company	OH0002623	OH	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 11.54 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Jun 1, 2027	1.455 mg/L (6 values)	0.126×
Granger Township Fire Department	OH0151763	OH	Industrial	.0008 MGD	Nitrogen, ammonia total [as N]	monthly average 0.0028 kg/d (May–Oct), new	Jun 1, 2027	under 3 values	—
Granger Township Fire Department	OH0151763	OH	Industrial	.0008 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (May–Oct), new	Jun 1, 2027	under 3 values	—
Granger Township Fire Department	OH0151763	OH	Industrial	.0008 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Jun 1, 2027	under 3 values	—
Granger Township Fire Department	OH0151763	OH	Industrial	.0008 MGD	Nitrogen, ammonia total [as N]	monthly average 0.0085 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Jun 1, 2027	under 3 values	—
Granger Township Fire Department	OH0151763	OH	Industrial	.0008 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.0043 kg/d (May–Oct), new	Jun 1, 2027	under 3 values	—
Granger Township Fire Department	OH0151763	OH	Industrial	.0008 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (May–Oct), new	Jun 1, 2027	under 3 values	—
Granger Township Fire Department	OH0151763	OH	Industrial	.0008 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.013 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Jun 1, 2027	under 3 values	—
Granger Township Fire Department	OH0151763	OH	Industrial	.0008 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Jun 1, 2027	under 3 values	—
Big Bear Lake Family Resort	OH0151726	OH	Industrial	.0015 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (Jun, Aug), new	Jun 1, 2027	under 3 values	—
Big Bear Lake Family Resort	OH0151726	OH	Industrial	.0015 MGD	Nitrogen, ammonia total [as N]	monthly average 0.0057 kg/d (Jun, Aug), new	Jun 1, 2027	under 3 values	—
Big Bear Lake Family Resort	OH0151726	OH	Industrial	.0015 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Mar, Dec), new	Jun 1, 2027	under 3 values	—
Big Bear Lake Family Resort	OH0151726	OH	Industrial	.0015 MGD	Nitrogen, ammonia total [as N]	monthly average 0.017 kg/d (Mar, Dec), new	Jun 1, 2027	under 3 values	—
Big Bear Lake Family Resort	OH0151726	OH	Industrial	.0015 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.0085 kg/d (Jun, Aug), new	Jun 1, 2027	under 3 values	—
Big Bear Lake Family Resort	OH0151726	OH	Industrial	.0015 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (Jun, Aug), new	Jun 1, 2027	under 3 values	—
Big Bear Lake Family Resort	OH0151726	OH	Industrial	.0015 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.026 kg/d (Mar, Dec), new	Jun 1, 2027	under 3 values	—
Big Bear Lake Family Resort	OH0151726	OH	Industrial	.0015 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Mar, Dec), new	Jun 1, 2027	under 3 values	—
Hamler, Village of	OH0021105	OH	Sewage plant	.113 MGD	Nitrogen, ammonia total [as N]	monthly average 1.3 mg/L (May–Oct), tighter	Jun 1, 2027	under 3 values	—
Hamler, Village of	OH0021105	OH	Sewage plant	.113 MGD	Nitrogen, ammonia total [as N]	monthly average 0.56 kg/d (May–Oct), tighter	Jun 1, 2027	under 3 values	—
Hamler, Village of	OH0021105	OH	Sewage plant	.113 MGD	Nitrogen, ammonia total [as N]	weekly maximum 2 mg/L (May–Oct), tighter	Jun 1, 2027	under 3 values	—
Hamler, Village of	OH0021105	OH	Sewage plant	.113 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.86 kg/d (May–Oct), tighter	Jun 1, 2027	under 3 values	—
Lima Refining Company	OH0002623	OH	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 2.88 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Jun 1, 2027	under 3 values	—
Lima Refining Company	OH0002623	OH	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 48 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Jun 1, 2027	under 3 values	—
Lima Refining Company	OH0002623	OH	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 45 kg/d (May–Oct), tighter	Jun 1, 2027	under 3 values	—
Lima Refining Company	OH0002623	OH	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 2.68 mg/L (May–Oct), tighter	Jun 1, 2027	under 3 values	—
Lima Refining Company	OH0002623	OH	Industrial, major	—	Nitrogen, ammonia total [as N]	monthly average 24 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Jun 1, 2027	under 3 values	—
Lima Refining Company	OH0002623	OH	Industrial, major	—	Nitrogen, ammonia total [as N]	monthly average 1.44 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Jun 1, 2027	under 3 values	—
Lima Refining Company	OH0002623	OH	Industrial, major	—	Nitrogen, ammonia total [as N]	monthly average 1.34 mg/L (May–Oct), tighter	Jun 1, 2027	under 3 values	—
Lima Refining Company	OH0002623	OH	Industrial, major	—	Nitrogen, ammonia total [as N]	monthly average 22 kg/d (May–Oct), tighter	Jun 1, 2027	under 3 values	—
Lima Refining Company	OH0002623	OH	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 5.86 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Jun 1, 2027	under 3 values	—
Lima Refining Company	OH0002623	OH	Industrial, major	—	Nitrogen, ammonia total [as N]	monthly average 2.93 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Jun 1, 2027	under 3 values	—
Hartzell Methodist Church	OH0151750	OH	Industrial	.0005 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (Jun, Aug), new	Aug 1, 2027	under 3 values	—
Hartzell Methodist Church	OH0151750	OH	Industrial	.0005 MGD	Nitrogen, ammonia total [as N]	monthly average 0.0019 kg/d (Jun, Aug), new	Aug 1, 2027	under 3 values	—
Hartzell Methodist Church	OH0151750	OH	Industrial	.0005 MGD	Nitrogen, ammonia total [as N]	monthly average 0.0057 kg/d (Mar, Dec), new	Aug 1, 2027	under 3 values	—
Hartzell Methodist Church	OH0151750	OH	Industrial	.0005 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Mar, Dec), new	Aug 1, 2027	under 3 values	—
Hartzell Methodist Church	OH0151750	OH	Industrial	.0005 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (Jun, Aug), new	Aug 1, 2027	under 3 values	—
Hartzell Methodist Church	OH0151750	OH	Industrial	.0005 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.0028 kg/d (Jun, Aug), new	Aug 1, 2027	under 3 values	—
Hartzell Methodist Church	OH0151750	OH	Industrial	.0005 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Mar, Dec), new	Aug 1, 2027	under 3 values	—
Hartzell Methodist Church	OH0151750	OH	Industrial	.0005 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.0085 kg/d (Mar, Dec), new	Aug 1, 2027	under 3 values	—
City of Euclid WWTP	OH0031062	OH	Sewage plant, major	22 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (May–Oct), new	Sep 1, 2027	0.069 mg/L (5 values)	0.069×
City of Euclid WWTP	OH0031062	OH	Sewage plant, major	22 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Sep 1, 2027	0.14 mg/L (6 values)	0.0467×
City of Euclid WWTP	OH0031062	OH	Sewage plant, major	22 MGD	Nitrogen, ammonia total [as N]	monthly average 250 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Sep 1, 2027	under 3 values	—
City of Euclid WWTP	OH0031062	OH	Sewage plant, major	22 MGD	Nitrogen, ammonia total [as N]	monthly average 83 kg/d (May–Oct), new	Sep 1, 2027	under 3 values	—
City of Euclid WWTP	OH0031062	OH	Sewage plant, major	22 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Sep 1, 2027	under 3 values	—
City of Euclid WWTP	OH0031062	OH	Sewage plant, major	22 MGD	Nitrogen, ammonia total [as N]	weekly maximum 375 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Sep 1, 2027	under 3 values	—
City of Euclid WWTP	OH0031062	OH	Sewage plant, major	22 MGD	Nitrogen, ammonia total [as N]	weekly maximum 125 kg/d (May–Oct), new	Sep 1, 2027	under 3 values	—
City of Euclid WWTP	OH0031062	OH	Sewage plant, major	22 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (May–Oct), new	Sep 1, 2027	under 3 values	—
Lake Loramie Special Sanitary SD	OH0096733	OH	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	weekly maximum 3.15 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Oct 1, 2027	0.9 mg/L (6 values)	0.286×
Lake Loramie Special Sanitary SD	OH0096733	OH	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	weekly maximum 7.2 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Oct 1, 2027	1.795 kg/d (6 values)	0.249×
Lake Loramie Special Sanitary SD	OH0096733	OH	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	monthly average 2.1 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Oct 1, 2027	0.47 mg/L (6 values)	0.224×
Lake Loramie Special Sanitary SD	OH0096733	OH	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.05 mg/L (May–Oct), tighter	Oct 1, 2027	0.2 mg/L (5 values)	0.19×
Lake Loramie Special Sanitary SD	OH0096733	OH	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	monthly average 0.7 mg/L (May–Oct), tighter	Oct 1, 2027	0.13 mg/L (5 values)	0.186×
Lake Loramie Special Sanitary SD	OH0096733	OH	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	monthly average 4.8 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Oct 1, 2027	0.82 kg/d (6 values)	0.171×
Lake Loramie Special Sanitary SD	OH0096733	OH	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	weekly maximum 2.4 kg/d (May–Oct), tighter	Oct 1, 2027	0.25 kg/d (5 values)	0.104×
Lake Loramie Special Sanitary SD	OH0096733	OH	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	monthly average 1.6 kg/d (May–Oct), tighter	Oct 1, 2027	0.16 kg/d (5 values)	0.1×
Regal Plumbing & Heating Company	OH0151765	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	monthly average 0.004 kg/d (Jun, Aug), new	Dec 1, 2027	under 3 values	—
Regal Plumbing & Heating Company	OH0151765	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (Jun, Aug), new	Dec 1, 2027	under 3 values	—
Regal Plumbing & Heating Company	OH0151765	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	monthly average 0.011 kg/d (Mar, Dec), new	Dec 1, 2027	under 3 values	—
Regal Plumbing & Heating Company	OH0151765	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Mar, Dec), new	Dec 1, 2027	under 3 values	—
Regal Plumbing & Heating Company	OH0151765	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (Jun, Aug), new	Dec 1, 2027	under 3 values	—
Regal Plumbing & Heating Company	OH0151765	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.006 kg/d (Jun, Aug), new	Dec 1, 2027	under 3 values	—
Regal Plumbing & Heating Company	OH0151765	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.017 kg/d (Mar, Dec), new	Dec 1, 2027	under 3 values	—
Regal Plumbing & Heating Company	OH0151765	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Mar, Dec), new	Dec 1, 2027	under 3 values	—
city of Sunbury	OH0055093	OH	Sewage plant	2 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.2 mg/L (May–Oct), tighter	Jan 1, 2028	0.26 mg/L (5 values)	0.217×
city of Sunbury	OH0055093	OH	Sewage plant	2 MGD	Nitrogen, ammonia total [as N]	monthly average 0.8 mg/L (May–Oct), tighter	Jan 1, 2028	0.17 mg/L (5 values)	0.212×
Brentwood Lake WWTP	OH0026158	OH	Sewage plant	.12 MGD	Nitrogen, ammonia total [as N]	monthly average 1.4 mg/L (May–Oct), tighter	Jan 1, 2028	0.095 mg/L (5 values)	0.0679×
Brentwood Lake WWTP	OH0026158	OH	Sewage plant	.12 MGD	Nitrogen, ammonia total [as N]	monthly average 0.64 kg/d (May–Oct), tighter	Jan 1, 2028	0.024 kg/d (5 values)	0.0375×
Brentwood Lake WWTP	OH0026158	OH	Sewage plant	.12 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1 kg/d (May–Oct), tighter	Jan 1, 2028	0.033 kg/d (5 values)	0.033×
Green Hills Golf Course & Inn, Inc.	OH0151713	OH	Industrial	.013 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Feb 1, 2028	under 3 values	—
Green Hills Golf Course & Inn, Inc.	OH0151713	OH	Industrial	.013 MGD	Nitrogen, ammonia total [as N]	monthly average 0.15 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Feb 1, 2028	under 3 values	—
Green Hills Golf Course & Inn, Inc.	OH0151713	OH	Industrial	.013 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (May–Oct), new	Feb 1, 2028	under 3 values	—
Green Hills Golf Course & Inn, Inc.	OH0151713	OH	Industrial	.013 MGD	Nitrogen, ammonia total [as N]	monthly average 0.049 kg/d (May–Oct), new	Feb 1, 2028	under 3 values	—
Green Hills Golf Course & Inn, Inc.	OH0151713	OH	Industrial	.013 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Feb 1, 2028	under 3 values	—
Green Hills Golf Course & Inn, Inc.	OH0151713	OH	Industrial	.013 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.22 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Feb 1, 2028	under 3 values	—
Green Hills Golf Course & Inn, Inc.	OH0151713	OH	Industrial	.013 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (May–Oct), new	Feb 1, 2028	under 3 values	—
Green Hills Golf Course & Inn, Inc.	OH0151713	OH	Industrial	.013 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.074 kg/d (May–Oct), new	Feb 1, 2028	under 3 values	—
Tiffin Moose Family Center: Lodge #846	OH0151717	OH	Industrial	.005 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Mar, Dec), new	Feb 1, 2028	under 3 values	—
Tiffin Moose Family Center: Lodge #846	OH0151717	OH	Industrial	.005 MGD	Nitrogen, ammonia total [as N]	monthly average 0.057 kg/d (Mar, Dec), new	Feb 1, 2028	under 3 values	—
Tiffin Moose Family Center: Lodge #846	OH0151717	OH	Industrial	.005 MGD	Nitrogen, ammonia total [as N]	monthly average 0.019 kg/d (Jun, Aug), new	Feb 1, 2028	under 3 values	—
Tiffin Moose Family Center: Lodge #846	OH0151717	OH	Industrial	.005 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (Jun, Aug), new	Feb 1, 2028	under 3 values	—
Tiffin Moose Family Center: Lodge #846	OH0151717	OH	Industrial	.005 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Mar, Dec), new	Feb 1, 2028	under 3 values	—
Tiffin Moose Family Center: Lodge #846	OH0151717	OH	Industrial	.005 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.085 kg/d (Mar, Dec), new	Feb 1, 2028	under 3 values	—
Tiffin Moose Family Center: Lodge #846	OH0151717	OH	Industrial	.005 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (Jun, Aug), new	Feb 1, 2028	under 3 values	—
Tiffin Moose Family Center: Lodge #846	OH0151717	OH	Industrial	.005 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.028 kg/d (Jun, Aug), new	Feb 1, 2028	under 3 values	—
Clinton Lake Camping	OH0151732	OH	Industrial	.0175 MGD	Nitrogen, ammonia total [as N]	monthly average 0.068 kg/d (May–Oct), new	Apr 1, 2028	under 3 values	—
Clinton Lake Camping	OH0151732	OH	Industrial	.0175 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (May–Oct), new	Apr 1, 2028	under 3 values	—
Clinton Lake Camping	OH0151732	OH	Industrial	.0175 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Apr 1, 2028	under 3 values	—
Clinton Lake Camping	OH0151732	OH	Industrial	.0175 MGD	Nitrogen, ammonia total [as N]	monthly average 0.2 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Apr 1, 2028	under 3 values	—
Clinton Lake Camping	OH0151732	OH	Industrial	.0175 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.1 kg/d (May–Oct), new	Apr 1, 2028	under 3 values	—
Clinton Lake Camping	OH0151732	OH	Industrial	.0175 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (May–Oct), new	Apr 1, 2028	under 3 values	—
Clinton Lake Camping	OH0151732	OH	Industrial	.0175 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Apr 1, 2028	under 3 values	—
Clinton Lake Camping	OH0151732	OH	Industrial	.0175 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.31 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Apr 1, 2028	under 3 values	—
Morral Companies, LLC	OH0143839	OH	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 7.3 mg/L (May–Oct), new	May 1, 2028	under 3 values	—
Morral Companies, LLC	OH0143839	OH	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 5.4 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	May 1, 2028	under 3 values	—
Sorrowful Mothers Shrine	OH0151744	OH	Industrial	.0225 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (May–Oct), new	Jun 1, 2028	0.065 mg/L (4 values)	0.065×
Sorrowful Mothers Shrine	OH0151744	OH	Industrial	.0225 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Jun 1, 2028	0.07 mg/L (6 values)	0.0233×
7900 Morgan Road	OH0151781	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (Jun, Aug), new	Jun 1, 2028	under 3 values	—
7900 Morgan Road	OH0151781	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	monthly average 0.0038 kg/d (Jun, Aug), new	Jun 1, 2028	under 3 values	—
7900 Morgan Road	OH0151781	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Mar, Dec), new	Jun 1, 2028	under 3 values	—
7900 Morgan Road	OH0151781	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	monthly average 0.011 kg/d (Mar, Dec), new	Jun 1, 2028	under 3 values	—
7900 Morgan Road	OH0151781	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (Jun, Aug), new	Jun 1, 2028	under 3 values	—
7900 Morgan Road	OH0151781	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.0057 kg/d (Jun, Aug), new	Jun 1, 2028	under 3 values	—
7900 Morgan Road	OH0151781	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Mar, Dec), new	Jun 1, 2028	under 3 values	—
7900 Morgan Road	OH0151781	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.017 kg/d (Mar, Dec), new	Jun 1, 2028	under 3 values	—
Berauer Rd.	OH0151780	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Mar, Dec), new	Jun 1, 2028	under 3 values	—
Berauer Rd.	OH0151780	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	monthly average 0.011 kg/d (Mar, Dec), new	Jun 1, 2028	under 3 values	—
Berauer Rd.	OH0151780	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	monthly average 0.0038 kg/d (Jun, Aug), new	Jun 1, 2028	under 3 values	—
Berauer Rd.	OH0151780	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (Jun, Aug), new	Jun 1, 2028	under 3 values	—
Berauer Rd.	OH0151780	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Mar, Dec), new	Jun 1, 2028	under 3 values	—
Berauer Rd.	OH0151780	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.017 kg/d (Mar, Dec), new	Jun 1, 2028	under 3 values	—
Berauer Rd.	OH0151780	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.0057 kg/d (Jun, Aug), new	Jun 1, 2028	under 3 values	—
Berauer Rd.	OH0151780	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (Jun, Aug), new	Jun 1, 2028	under 3 values	—
Sorrowful Mothers Shrine	OH0151744	OH	Industrial	.0225 MGD	Nitrogen, ammonia total [as N]	monthly average 0.085 kg/d (May–Oct), new	Jun 1, 2028	under 3 values	—
Sorrowful Mothers Shrine	OH0151744	OH	Industrial	.0225 MGD	Nitrogen, ammonia total [as N]	monthly average 0.26 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Jun 1, 2028	under 3 values	—
Sorrowful Mothers Shrine	OH0151744	OH	Industrial	.0225 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (May–Oct), new	Jun 1, 2028	under 3 values	—
Sorrowful Mothers Shrine	OH0151744	OH	Industrial	.0225 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.13 kg/d (May–Oct), new	Jun 1, 2028	under 3 values	—
Sorrowful Mothers Shrine	OH0151744	OH	Industrial	.0225 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Jun 1, 2028	under 3 values	—
Sorrowful Mothers Shrine	OH0151744	OH	Industrial	.0225 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.38 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Jun 1, 2028	under 3 values	—
St Jude Ball Field Concessions & Restroom	OH0151720	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	monthly average 0.0038 kg/d (Jun, Aug), new	Jun 1, 2028	under 3 values	—
St Jude Ball Field Concessions & Restroom	OH0151720	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (Jun, Aug), new	Jun 1, 2028	under 3 values	—
St Jude Ball Field Concessions & Restroom	OH0151720	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.0057 kg/d (Jun, Aug), new	Jun 1, 2028	under 3 values	—
St Jude Ball Field Concessions & Restroom	OH0151720	OH	Industrial	.001 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (Jun, Aug), new	Jun 1, 2028	under 3 values	—
Village of Lowell WWTP	OH6020311	OH	Industrial	.1081 MGD	Nitrogen, ammonia total [as N]	monthly average 5.4 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Aug 1, 2028	under 3 values	—
Village of Lowell WWTP	OH6020311	OH	Industrial	.1081 MGD	Nitrogen, ammonia total [as N]	monthly average 9.5 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Aug 1, 2028	under 3 values	—
Village of Lowell WWTP	OH6020311	OH	Industrial	.1081 MGD	Nitrogen, ammonia total [as N]	monthly average 8.9 mg/L (May–Oct), new	Aug 1, 2028	under 3 values	—
Village of Lowell WWTP	OH6020311	OH	Industrial	.1081 MGD	Nitrogen, ammonia total [as N]	monthly average 5.1 kg/d (May–Oct), new	Aug 1, 2028	under 3 values	—
Village of Lowell WWTP	OH6020311	OH	Industrial	.1081 MGD	Nitrogen, ammonia total [as N]	weekly maximum 8.1 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Aug 1, 2028	under 3 values	—
Village of Lowell WWTP	OH6020311	OH	Industrial	.1081 MGD	Nitrogen, ammonia total [as N]	weekly maximum 14.2 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Aug 1, 2028	under 3 values	—
Village of Lowell WWTP	OH6020311	OH	Industrial	.1081 MGD	Nitrogen, ammonia total [as N]	weekly maximum 7.6 kg/d (May–Oct), new	Aug 1, 2028	under 3 values	—
Village of Lowell WWTP	OH6020311	OH	Industrial	.1081 MGD	Nitrogen, ammonia total [as N]	weekly maximum 13.4 mg/L (May–Oct), new	Aug 1, 2028	under 3 values	—
Chillicothe WWTP - Easterly	OH0024406	OH	Sewage plant, major	3.8 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (May–Oct), tighter	Dec 1, 2028	0.23 mg/L (5 values)	0.23×
Chillicothe WWTP - Easterly	OH0024406	OH	Sewage plant, major	3.8 MGD	Nitrogen, ammonia total [as N]	monthly average 14 kg/d (May–Oct), tighter	Dec 1, 2028	2.15 kg/d (5 values)	0.154×
Village of Genoa WWTP	OH0021016	OH	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (May–Oct), tighter	Dec 1, 2028	0.22 mg/L (5 values)	0.147×
Village of Genoa WWTP	OH0021016	OH	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (May–Oct), tighter	Dec 1, 2028	0.11 mg/L (5 values)	0.11×
Village of Genoa WWTP	OH0021016	OH	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	weekly maximum 3.4 kg/d (May–Oct), tighter	Dec 1, 2028	0.22 kg/d (5 values)	0.0647×
Village of Genoa WWTP	OH0021016	OH	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	monthly average 2.3 kg/d (May–Oct), tighter	Dec 1, 2028	0.099 kg/d (5 values)	0.043×
High Stakes Farms	OH0151766	OH	Industrial	.006 MGD	Nitrogen, ammonia total [as N]	monthly average 0.023 kg/d (Jun, Aug), new	Dec 1, 2028	under 3 values	—
High Stakes Farms	OH0151766	OH	Industrial	.006 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (Jun, Aug), new	Dec 1, 2028	under 3 values	—
High Stakes Farms	OH0151766	OH	Industrial	.006 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.034 kg/d (Jun, Aug), new	Dec 1, 2028	under 3 values	—
High Stakes Farms	OH0151766	OH	Industrial	.006 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (Jun, Aug), new	Dec 1, 2028	under 3 values	—
Flat Rock Homes	OHDA00008	OH	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 0.034 kg/d (Mar, Dec), new	Mar 1, 2029	under 3 values	—
Flat Rock Homes	OHDA00008	OH	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Mar, Dec), new	Mar 1, 2029	under 3 values	—
Flat Rock Homes	OHDA00008	OH	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 0.011 kg/d (Jun, Aug), new	Mar 1, 2029	under 3 values	—
Flat Rock Homes	OHDA00008	OH	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (Jun, Aug), new	Mar 1, 2029	under 3 values	—
Flat Rock Homes	OHDA00008	OH	Industrial	—	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Mar, Dec), new	Mar 1, 2029	under 3 values	—
Flat Rock Homes	OHDA00008	OH	Industrial	—	Nitrogen, ammonia total [as N]	weekly maximum 0.051 kg/d (Mar, Dec), new	Mar 1, 2029	under 3 values	—
Flat Rock Homes	OHDA00008	OH	Industrial	—	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (Jun, Aug), new	Mar 1, 2029	under 3 values	—
Flat Rock Homes	OHDA00008	OH	Industrial	—	Nitrogen, ammonia total [as N]	weekly maximum 0.017 kg/d (Jun, Aug), new	Mar 1, 2029	under 3 values	—
Milan WWTP	OH0022641	OH	Sewage plant	.37 MGD	Nitrogen, ammonia total [as N]	monthly average 16 mg/L (May–Oct), tighter	Apr 1, 2029	6.815 mg/L (6 values)	0.426×
Milan WWTP	OH0022641	OH	Sewage plant	.37 MGD	Nitrogen, ammonia total [as N]	weekly maximum 24 mg/L (May–Oct), tighter	Apr 1, 2029	9.3 mg/L (6 values)	0.388×
Milan WWTP	OH0022641	OH	Sewage plant	.37 MGD	Nitrogen, ammonia total [as N]	monthly average 22 kg/d (May–Oct), tighter	Apr 1, 2029	3.82 kg/d (6 values)	0.174×
Milan WWTP	OH0022641	OH	Sewage plant	.37 MGD	Nitrogen, ammonia total [as N]	weekly maximum 34 kg/d (May–Oct), tighter	Apr 1, 2029	5.35 kg/d (6 values)	0.157×
Village of Antwerp WWTP	OH0022195	OH	Sewage plant	.33 MGD	Nitrogen, ammonia total [as N]	monthly average 0.25 kg/d (May–Oct), new	Aug 1, 2029	under 3 values	—
Village of Antwerp WWTP	OH0022195	OH	Sewage plant	.33 MGD	Nitrogen, ammonia total [as N]	monthly average 0.57 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Aug 1, 2029	under 3 values	—
Village of Antwerp WWTP	OH0022195	OH	Sewage plant	.33 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.3 mg/L (May–Oct), new	Aug 1, 2029	under 3 values	—
Village of Antwerp WWTP	OH0022195	OH	Sewage plant	.33 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.37 kg/d (May–Oct), new	Aug 1, 2029	under 3 values	—
Village of Antwerp WWTP	OH0022195	OH	Sewage plant	.33 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.69 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Aug 1, 2029	under 3 values	—
Village of Antwerp WWTP	OH0022195	OH	Sewage plant	.33 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.86 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Aug 1, 2029	under 3 values	—
Grand Rapids WWTP	OH0021881	OH	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	monthly average 1.9 mg/L (May–Oct), tighter	Sep 1, 2029	0.84 mg/L (5 values)	0.442×
Grand Rapids WWTP	OH0021881	OH	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	weekly maximum 2.9 mg/L (May–Oct), tighter	Sep 1, 2029	0.96 mg/L (5 values)	0.331×
Grand Rapids WWTP	OH0021881	OH	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	monthly average 1.3 kg/d (May–Oct), tighter	Sep 1, 2029	0.233 kg/d (5 values)	0.179×
Grand Rapids WWTP	OH0021881	OH	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	weekly maximum 2 kg/d (May–Oct), tighter	Sep 1, 2029	0.302 kg/d (5 values)	0.151×
Medina County Chippewa Lake Sewer District 700	OH0026395	OH	Sewage plant	1 MGD	Nitrogen, ammonia total [as N]	weekly maximum 4.5 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Feb 1, 2030	0.525 mg/L (6 values)	0.117×
Medina County Chippewa Lake Sewer District 700	OH0026395	OH	Sewage plant	1 MGD	Nitrogen, ammonia total [as N]	weekly maximum 17 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Feb 1, 2030	1.685 kg/d (6 values)	0.0991×
Medina County Chippewa Lake Sewer District 700	OH0026395	OH	Sewage plant	1 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Feb 1, 2030	0.291 mg/L (6 values)	0.097×
Medina County Chippewa Lake Sewer District 700	OH0026395	OH	Sewage plant	1 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.5 mg/L (May–Oct), tighter	Feb 1, 2030	0.13 mg/L (5 values)	0.0867×
Medina County Chippewa Lake Sewer District 700	OH0026395	OH	Sewage plant	1 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (May–Oct), tighter	Feb 1, 2030	0.081 mg/L (5 values)	0.081×
Medina County Chippewa Lake Sewer District 700	OH0026395	OH	Sewage plant	1 MGD	Nitrogen, ammonia total [as N]	monthly average 11.4 kg/d (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Feb 1, 2030	0.555 kg/d (6 values)	0.0487×
Medina County Chippewa Lake Sewer District 700	OH0026395	OH	Sewage plant	1 MGD	Nitrogen, ammonia total [as N]	monthly average 3.8 kg/d (May–Oct), tighter	Feb 1, 2030	0.1 kg/d (5 values)	0.0263×
Medina County Chippewa Lake Sewer District 700	OH0026395	OH	Sewage plant	1 MGD	Nitrogen, ammonia total [as N]	weekly maximum 5.7 kg/d (May–Oct), tighter	Feb 1, 2030	0.15 kg/d (5 values)	0.0263×
City of Pataskala WRF	OH0020273	OH	Sewage plant	1.1 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.7 mg/L (May–Oct), tighter	May 1, 2030	0.56 mg/L (5 values)	0.329×
City of Pataskala WRF	OH0020273	OH	Sewage plant	1.1 MGD	Nitrogen, ammonia total [as N]	monthly average 1.1 mg/L (May–Oct), tighter	May 1, 2030	0.23 mg/L (5 values)	0.209×
City of Pataskala WRF	OH0020273	OH	Sewage plant	1.1 MGD	Nitrogen, ammonia total [as N]	weekly maximum 5.4 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	May 1, 2030	1.005 mg/L (6 values)	0.186×
City of Pataskala WRF	OH0020273	OH	Sewage plant	1.1 MGD	Nitrogen, ammonia total [as N]	monthly average 3.6 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	May 1, 2030	0.432 mg/L (6 values)	0.12×

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=OH&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