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Riverhead (T)

Sewage treatment plant, major discharger, Riverhead, New York. NPDES permit NY0020061 expired Sep 30, 2016; its limits still apply. Last 12 months: over a limit 2 times (last August 2026), 4 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form M monthly (33 values), outfall 001 form Q quarterly (2 values), outfall 002 form A monthly (7 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 1 of 29 reports late

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

Period endingParameterReportedLimitOver by
July 2026Nitrogen, total [as N], monthly average43.4 lb/d≤ 40 lb/d9%
August 2026Nitrogen, total [as N], monthly average41.7 lb/d≤ 40 lb/d4%

Limits in force (44)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspended7-day average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 375 lb/dall year001
Solids, total suspended7-day average≤ 560 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendedmonthly averagereport only (lb/d)all year001
Solids, settleabledaily maximum≤ .3 mL/Lall year001
Nitrogen, total [as N]monthly average≤ 40 lb/dMay–Sep001
Nitrogen, total [as N]monthly average≤ 130 lb/dJan, Feb, Mar, Apr, Sep, Oct, Nov, Dec001
Nitrogen, nitrite total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, nitrite total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, nitrate total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, nitrate total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (lb/d)all year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Nickel, total [as Ni]daily maximum≤ .05 mg/L (alert, not enforceable)all year001
Nickel, total [as Ni]daily maximumreport only (lb/d) (alert, not enforceable)all year001
Flow, in conduit or thru treatment plantmonthly average≤ 1.5 MGDall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Chlorine, total residualdaily maximumreport only (mg/L)all year001
Phosphorous, in total orthophosphatemonthly averagereport only (lb/d)all year001
Coliform, fecal general30-day geometric mean≤ 200 MPN/100mLall year001
Coliform, fecal general7-day geometric mean≤ 400 MPN/100mLall year001
Coliform, total generalmonthly median≤ 700 MPN/100mLall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 310 lb/dall year001
BOD, carbonaceous [5 day, 20 C]7-day average≤ 500 lb/dall year001
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year001
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Carbonaceous oxygen demand, % removalmonthly average minimum≥ 85 %all year001
Ammonia & ammonium- totalmonthly averagereport only (lb/d)all year001
Flow ratemonthly average≤ .45 MGDall year002
Turbiditydaily average≤ 2 NTUall year002
Turbidityinstantaneous maximum≤ 10 NTUall year002
Solids, total suspendeddaily maximum≤ 5 mg/Lall year002
% of fecal coliform samples < detectableweekly minimum≥ 57 %all year002
E. colidaily maximumreport only (#/100mL)all year002
Coliform, fecal generaldaily maximum≤ 23 #/100mLall year002

How strict are these limits?

Cited limits by parameter: New York'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/NY0020061 · MCP: https://passage-data.com/mcp