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Village of Ridgewood

Sewage treatment plant, major discharger, Glen Rock Boro, New Jersey. NPDES permit NJ0024791, in force until Mar 31, 2031. Last 12 months: over a limit 8 times (last June 2026), 2 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 26 days after each period: form A monthly (69 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
8 values over a limit, 0 required values missing, 2 of 12 reports late

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

Period endingParameterReportedLimitOver by
October 2025Nitrogen, nitrate total [as N], daily maximum38 mg/L≤ 31.8 mg/L19%
October 2025Phosphorus, total [as P], daily maximum5.4 mg/L≤ 5.2 mg/L4%
October 2025Phosphorus, total [as P], monthly average4.89 mg/L≤ 4.3 mg/L14%
November 2025Phosphorus, total [as P], daily maximum5.4 mg/L≤ 5.2 mg/L4%
November 2025Phosphorus, total [as P], monthly average4.91 mg/L≤ 4.3 mg/L14%
December 2025Phosphorus, total [as P], monthly average4.53 mg/L≤ 4.3 mg/L5%
January 2026Phosphorus, total [as P], monthly average4.53 mg/L≤ 4.3 mg/L5%
June 2026Phosphorus, total [as P], monthly average4.7 mg/L≤ 4.3 mg/L9%

Limits in force (73)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademinimumreport only (deg C)all year
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigrademaximumreport only (deg C)all year
Temperature, water deg. centigrademinimumreport only (deg C)all year
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigrademaximumreport only (deg C)all year
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/Lall year
Oxygen, dissolved [DO]daily average minimumreport only (mg/L)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
pHminimumreport only (SU)all year
pHmaximumreport only (SU)all year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 567 kg/dall year
Solids, total suspendedweekly average≤ 851 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 & Greasedaily maximum≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 13.3 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 4 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 21.8 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 6.5 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 252 kg/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 75.7 kg/dMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 413 kg/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 123 kg/dMay–Oct
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)all year
Nitrogen, nitrate total [as N]daily maximum≤ 31.8 mg/Lall 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≤ 4.3 mg/Lall year
Phosphorus, total [as P]daily maximum≤ 5.2 mg/Lall year
Phosphorus, total [as P]monthly averagereport only (kg/d)all year
Phosphorus, total [as P]daily maximumreport only (kg/d)all year
Copper, total recoverablemonthly average≤ 16.44 ug/Lall year
Copper, total recoverabledaily maximum≤ 22.5 ug/Lall year
Copper, total recoverablemonthly average≤ 311.2 g/dall year
Copper, total recoverabledaily maximum≤ 424.8 g/dall year
Chlorine produced oxidantsmonthly average≤ .02 mg/Lall year
Chlorine produced oxidantsdaily maximum≤ .03 mg/Lall year
Chlorine produced oxidantsmonthly average≤ .38 kg/dall year
Chlorine produced oxidantsdaily maximum≤ .56 kg/dall year
Chlorodibromomethanemonthly averagereport only (ug/L)all year
Chlorodibromomethanedaily maximumreport only (ug/L)all year
Chlorodibromomethanemonthly averagereport only (g/d)all year
Chlorodibromomethanedaily maximumreport only (g/d)all year
Bromodichloromethane, effluentmonthly averagereport only (ug/L)all year
Bromodichloromethane, effluentdaily maximumreport only (ug/L)all year
Bromodichloromethane, effluentmonthly averagereport only (g/d)all year
Bromodichloromethane, effluentdaily maximumreport only (g/d)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 geometric mean≤ 126 #/100mLall year
E. coliinstantaneous maximumreport only (#/100mL)all year
Solids, total dissolvedmonthly averagereport only (mg/L)all year
Solids, total dissolvedweekly averagereport only (mg/L)all year
Solids, total dissolvedmonthly averagereport only (kg/d)all year
Solids, total dissolvedweekly averagereport only (kg/d)all year
Mercury, total recoverablemonthly averagereport only (ug/L)all year
Mercury, total recoverabledaily maximumreport only (ug/L)all year
Mercury, total recoverablemonthly averagereport only (g/d)all year
Mercury, total recoverabledaily maximumreport only (g/d)all year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 16 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 24 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 303 kg/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 454 kg/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]monthly average minimum≥ 85 %all year
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 35 %all year

New limits from Apr 1, 2029

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Bromodichloromethane, effluent, daily maximum3.64 ug/Lnew3.76 ug/L (5 values)1.03×
Bromodichloromethane, effluent, monthly average37.32 g/dnew39.46 g/d (5 values)1.06×
Bromodichloromethane, effluent, monthly average1.97 ug/Lnew3.76 ug/L (5 values)1.91×
Bromodichloromethane, effluent, daily maximum68.86 g/dnew39.46 g/d (5 values)0.573×
Chlorodibromomethane, daily maximum2.58 ug/Lnew0.97 ug/L (5 values, 2 below detection)0.376×
Chlorodibromomethane, daily maximum48.82 g/dnew14.56 g/d (5 values, 2 below detection)0.298×
Chlorodibromomethane, monthly average27.14 g/dnew14.56 g/d (5 values, 2 below detection)0.536×
Chlorodibromomethane, monthly average1.43 ug/Lnew0.97 ug/L (5 values, 2 below detection)0.678×
Copper, total recoverable, daily maximum22.21 ug/Ltighter8.3 ug/L (11 values, 5 below detection)0.374×
Copper, total recoverable, daily maximum420.26 g/dtighter71.6 g/d (11 values, 5 below detection)0.17×
Mercury, total recoverable, daily maximum3.05 g/dnew0.226 g/d (7 values, 7 below detection)—
Mercury, total recoverable, daily maximum0.16 ug/Lnew0.0251 ug/L (7 values, 7 below detection)—
Mercury, total recoverable, monthly average1.71 g/dnew0.226 g/d (7 values, 7 below detection)—
Mercury, total recoverable, monthly average0.09 ug/Lnew0.0251 ug/L (7 values, 7 below detection)—

How strict are these limits?

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

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