Passage Data · Check a report · Use it from your AI

Hamilton Co Brd of Comm Metropolitan SD

Sewage treatment plant, Cincinnati, Ohio. NPDES permit OH0025623 expired Jul 31, 2026; its limits still apply. Last 12 months: over a limit 17 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (29 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 23 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

All 17 values over a limit
Period endingParameterReportedLimitOver by
February 2026Nitrogen, ammonia total [as N], weekly maximum5.45≤ 3 mg/L82%
March 2026Solids, total suspended, monthly average11.6≤ 3.64 kg/d219%
March 2026Solids, total suspended, monthly average17.4≤ 12 mg/L45%
March 2026Solids, total suspended, weekly maximum83.3≤ 5.46 kg/d1426%
March 2026Solids, total suspended, weekly maximum89.7≤ 18 mg/L398%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average11≤ 10 mg/L10%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average7.7≤ 3.03 kg/d154%
May 2026BOD, carbonaceous [5 day, 20 C], weekly maximum24≤ 4.55 kg/d427%
May 2026BOD, carbonaceous [5 day, 20 C], weekly maximum30≤ 15 mg/L100%
May 2026Solids, total suspended, monthly average25.8≤ 3.64 kg/d609%
May 2026Solids, total suspended, monthly average35.5≤ 12 mg/L196%
May 2026Solids, total suspended, weekly maximum127≤ 5.46 kg/d2226%
May 2026Solids, total suspended, weekly maximum162≤ 18 mg/L800%
June 2026Nitrogen, ammonia total [as N], weekly maximum1.45≤ 1.1 mg/L32%
August 2026Solids, total suspended, monthly average5≤ 3.64 kg/d37%
August 2026Solids, total suspended, weekly maximum25≤ 5.46 kg/d358%
August 2026Solids, total suspended, weekly maximum38≤ 18 mg/L111%

Limits in force (43)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 12 mg/Lall year001
Solids, total suspendedweekly maximum≤ 18 mg/Lall year001
Solids, total suspendedmonthly average≤ 3.64 kg/dall year001
Solids, total suspendedweekly maximum≤ 5.46 kg/dall year001
Nitrogen, ammonia total [as N]monthly average≤ .7 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly maximum≤ 1.1 mg/LMay–Oct001
Nitrogen, ammonia total [as N]weekly maximum≤ 3 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ .212 kg/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ .606 kg/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly maximum≤ .334 kg/dMay–Oct001
Nitrogen, ammonia total [as N]weekly maximum≤ .909 kg/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jan, Mar, May, Jul, Sep, Nov001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Jan, Mar, May, Jul, Sep, Nov001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Jan, Mar, May, Jul, Sep, Nov001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Jan, Mar, May, Jul, Sep, Nov001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Turbidity [severity]monthly averagereport only (severity)all year001
Turbidity [severity]daily maximumreport only (severity)all year001
E. coli, MTEC-MFmonthly geometric mean≤ 126 MPN/100mLMay–Oct001
E. coli, MTEC-MFweekly geometric mean≤ 284 MPN/100mLMay–Oct001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)Jun, Dec001
Solids, total dissolved- 180 deg. Cdaily maximumreport only (mg/L)Jun, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 3.03 kg/dall year001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 4.55 kg/dall year001
Sludge waste from secondary clarifiersmonthly averagereport only (gal)Dec588
Sludge waste from secondary clarifiersdaily maximumreport only (gal)Dec588
Flow ratemonthly averagereport only (gal/d)all year602
Flow ratedaily maximumreport only (gal/d)all year602
Bypass valvemonthly averagereport only (occur/mo)all year602
Bypass valvedaily maximumreport only (occur/mo)all year602
Bypass of treatmentmonthly averagereport only (hr/mo)all year602
Bypass of treatmentdaily maximumreport only (hr/mo)all year602

How strict are these limits?

Cited limits by parameter: Ohio's rules and the federal ones.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OH0025623 · MCP: https://passage-data.com/mcp