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Portage/Catawba Island Wastewater Treatment Plant

Sewage treatment plant, Port Clinton, Ohio. NPDES permit OH0095435, in force until Mar 31, 2031. Last 12 months: over a limit 2 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (45 values), outfall 300 form A monthly (2 values), outfall 601 form A monthly (6 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 39 reports late

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

Period endingParameterReportedLimit
July 2026E. coli, MTEC-MF, monthly geometric meanT≤ 126 MPN/100mL
July 2026E. coli, MTEC-MF, weekly geometric meanT≤ 284 MPN/100mL

Limits in force (109)

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≥ 6 mg/Lall year001
Solids, total suspendedmonthly average≤ 30 mg/LMay–Oct001
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedweekly maximum≤ 45 mg/LMay–Oct001
Solids, total suspendedweekly maximum≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedmonthly average≤ 152 kg/dMay–Oct001
Solids, total suspendedmonthly average≤ 77 kg/dJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedweekly maximum≤ 228 kg/dMay–Oct001
Solids, total suspendedweekly maximum≤ 116 kg/dJan, Feb, Mar, Apr, Nov, Dec001
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/Lall year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)May–Oct001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)May–Oct001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly average≤ 1 mg/LMay–Oct001
Phosphorus, total [as P]monthly average≤ 1 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Phosphorus, total [as P]weekly maximum≤ 1.5 mg/LMay–Oct001
Phosphorus, total [as P]weekly maximum≤ 1.5 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Phosphorus, total [as P]monthly average≤ 5.1 kg/dMay–Oct001
Phosphorus, total [as P]monthly average≤ 2.6 kg/dJan, Feb, Mar, Apr, Nov, Dec001
Phosphorus, total [as P]weekly maximum≤ 7.6 kg/dMay–Oct001
Phosphorus, total [as P]weekly maximum≤ 3.9 kg/dJan, Feb, Mar, Apr, Nov, Dec001
Phosphate, ortho, dissolved [as P]monthly averagereport only (mg/L)May–Oct001
Phosphate, ortho, dissolved [as P]daily maximumreport only (mg/L)May–Oct001
Nickel, total recoverablemonthly averagereport only (ug/L)Sep001
Nickel, total recoverabledaily maximumreport only (ug/L)Sep001
Zinc, total recoverablemonthly averagereport only (ug/L)Sep001
Zinc, total recoverabledaily maximumreport only (ug/L)Sep001
Cadmium, total recoverablemonthly averagereport only (ug/L)Sep001
Cadmium, total recoverabledaily maximumreport only (ug/L)Sep001
Lead, total recoverablemonthly averagereport only (ug/L)Sep001
Lead, total recoverabledaily maximumreport only (ug/L)Sep001
Chromium, total recoverablemonthly averagereport only (ug/L)Sep001
Chromium, total recoverabledaily maximumreport only (ug/L)Sep001
Copper, total recoverablemonthly averagereport only (ug/L)Sep001
Copper, total recoverabledaily maximumreport only (ug/L)Sep001
Chromium, hexavalent dissolved [as Cr]monthly averagereport only (ug/L)Sep001
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)Sep001
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
Chlorine, total residualdaily maximum≤ .038 mg/LMay–Oct001
Mercury, total low levelmonthly average≤ 1.3 ng/LJun, Aug001
Mercury, total low levelmonthly average≤ 1.3 ng/LMar, Dec001
Mercury, total low leveldaily maximum≤ 1700 ng/LJun, Aug001
Mercury, total low leveldaily maximum≤ 1700 ng/LMar, Dec001
Mercury, total low levelmonthly average≤ .000007 kg/dJun, Aug001
Mercury, total low levelmonthly average≤ .000004 kg/dMar, Dec001
Mercury, total low leveldaily maximum≤ .00863 kg/dJun, Aug001
Mercury, total low leveldaily maximum≤ .00438 kg/dMar, Dec001
Cyanide, free availablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec001
Cyanide, free availabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec001
pH, maximumdaily maximum≤ 9 SUall year001
pH, minimumdaily minimum≥ 6.5 SUall year001
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)all year001
Solids, total dissolved- 180 deg. Cdaily maximumreport only (mg/L)all year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 40 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 40 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 127 kg/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 64 kg/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 203 kg/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 103 kg/dJan, Feb, Mar, Apr, Nov, Dec001
Overflowsmonthly averagereport only (occur/mo)all year300
Overflowsdaily maximumreport only (occur/mo)all year300
Nitrogen, ammonia in bottom depositsmonthly averagereport only (mg/kg)Dec581
Nitrogen, ammonia in bottom depositsdaily maximumreport only (mg/kg)Dec581
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/kg)Dec581
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/kg)Dec581
Phosphorous, total, in bottom depositsmonthly averagereport only (mg/kg)Dec581
Phosphorous, total, in bottom depositsdaily maximumreport only (mg/kg)Dec581
Potassium, in bottom depositsmonthly averagereport only (mg/kg)Dec581
Potassium, in bottom depositsdaily maximumreport only (mg/kg)Dec581
Arsenic, dry weightdaily maximum≤ 75 mg/kgDec581
Cadmium, in bottom deposits [dry wgt]daily maximum≤ 85 mg/kgDec581
Copper in bottom deposits [dry wgt]daily maximum≤ 4300 mg/kgDec581
Lead, total dry weight [as Pb]daily maximum≤ 840 mg/kgDec581
Nickel, tot in bottom deposits [dry wgt]daily maximum≤ 420 mg/kgDec581
Zinc in bottom deposits [dry wgt]daily maximum≤ 7500 mg/kgDec581
Selenium, dry weightdaily maximum≤ 100 mg/kgDec581
Biosolids weight indluding admixturesmonthly averagereport only (dry ton)Dec581
Biosolids weight indluding admixturesdaily maximumreport only (dry ton)Dec581
Fecal coliform in sludge, CFU/gramdaily maximum≤ 2000000 CFU/gDec581
Sludge weight, drymonthly averagereport only (dry ton)Dec581
Sludge weight, drydaily maximumreport only (dry ton)Dec581
Mercury, tot in bot deposits [dry wgt]daily maximum≤ 57 mg/kgDec581
Molybdenum, sludge, total, dry weight [as Mo]daily maximum≤ 75 mg/kgDec581
Biosolids weight indluding admixturesmonthly averagereport only (dry ton)Dec586
Biosolids weight indluding admixturesdaily maximumreport only (dry ton)Dec586
Sludge waste from secondary clarifiersmonthly averagereport only (gal)Dec588
Sludge waste from secondary clarifiersdaily maximumreport only (gal)Dec588
pHdaily minimumreport only (SU)all year601
pHdaily maximumreport only (SU)all year601
Solids, total suspendedmonthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec601
Solids, total suspendedmonthly averagereport only (mg/L)May–Oct601
Solids, total suspendeddaily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec601
Solids, total suspendeddaily maximumreport only (mg/L)May–Oct601
Mercury, total low levelmonthly averagereport only (ng/L)Mar, Jun, Aug, Dec601
Mercury, total low leveldaily maximumreport only (ng/L)Mar, Jun, Aug, Dec601
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)May–Oct601
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec601
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)May–Oct601
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec601

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OH0095435 · MCP: https://passage-data.com/mcp