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Mercer Cnty

Sewage treatment plant, Hopewell Twp, New Jersey. NPDES permit NJ0027715 expired Sep 30, 2024; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 26 days after each period: form A monthly (66 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (70)

ParameterStatisticLimitMonths
Temperature, water deg. centigradeinstantaneous minimumreport only (deg C)all year
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year
Temperature, water deg. centigradeinstantaneous minimumreport only (deg C)all year
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year
Oxygen, dissolved [DO]daily average minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 4 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 1.36 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 2.04 kg/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly average minimum≥ 85 %all year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
pHinstantaneous minimumreport only (SU)all year
pHinstantaneous maximumreport only (SU)all year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 10.2 kg/dall year
Solids, total suspendedweekly average≤ 15.3 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all year
Solids, total suspendedmonthly average minimum≥ 85 %all year
Oil & Greasemonthly average≤ 10 mg/Lall year
Oil & Greaseinstantaneous maximum≤ 15 mg/Lall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ .9 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 1 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 2.5 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ .3 kg/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ .68 kg/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ .34 kg/dMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ .85 kg/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)all year
Nitrogen, nitrate total [as N]daily maximumreport only (mg/L)all year
Nitrogen, nitrate total [as N]monthly averagereport only (kg/d)all year
Nitrogen, nitrate total [as N]daily maximumreport only (kg/d)all year
Phosphorus, total [as P]monthly average≤ .5 mg/Lall year
Phosphorus, total [as P]weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly average≤ .17 kg/dall year
Phosphorus, total [as P]weekly averagereport only (kg/d)all year
Zinc, total recoverablemonthly averagereport only (ug/L)all year
Zinc, total recoverabledaily maximumreport only (ug/L)all year
Zinc, total recoverablemonthly average≤ 153.29 g/dall year
Zinc, total recoverabledaily maximum≤ 282.73 g/dall year
Copper, total recoverablemonthly averagereport only (ug/L)all year
Copper, total recoverabledaily maximumreport only (ug/L)all year
Copper, total recoverablemonthly average≤ 51.09 g/dall year
Copper, total recoverabledaily maximum≤ 95.38 g/dall year
Chlorine produced oxidantsmonthly average≤ .02 mg/Lall year
Chlorine produced oxidantsdaily maximum≤ .02 mg/Lall year
Chlorine produced oxidantsmonthly average≤ .0068 kg/dall year
Chlorine produced oxidantsdaily maximum≤ .0068 kg/dall year
Chloroformmonthly averagereport only (ug/L)all year
Chloroformdaily maximumreport only (ug/L)all year
Chloroformmonthly average≤ 7.15 g/dall year
Chloroformdaily maximum≤ 15.66 g/dall year
Bromodichloromethane, effluentmonthly averagereport only (ug/L)all year
Bromodichloromethane, effluentdaily maximumreport only (ug/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
E. colimonthly average≤ 126 #/100mLall year
E. coliinstantaneous maximumreport only (#/100mL)all year
Solids, total dissolvedmonthly averagereport only (mg/L)all year
Solids, total dissolveddaily maximumreport only (mg/L)all year
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 61 %all year

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NJ0027715 · MCP: https://passage-data.com/mcp