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Warwick Drainage Co

Services, Saint Peters, Pennsylvania. NPDES permit PA0050474 expired Jan 31, 2019; its limits still apply. Last 12 months: over a limit 11 times (last May 2026), 15 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (15 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
18 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
October 2025Chlorine, total residual, instantaneous maximum.02 mg/L≤ .019 mg/L5%
November 2025Chlorine, total residual, instantaneous maximum.02 mg/L≤ .019 mg/L5%
November 2025Oxygen, dissolved [DO], instantaneous minimum2.6 mg/L≥ 3 mg/L13%
December 2025Chlorine, total residual, instantaneous maximum.02 mg/L≤ .019 mg/L5%
January 2026Chlorine, total residual, instantaneous maximum.02 mg/L≤ .019 mg/L5%
February 2026Chlorine, total residual, instantaneous maximum.02 mg/L≤ .019 mg/L5%
March 2026Chlorine, total residual, instantaneous maximum.09 mg/L≤ .019 mg/L374%
March 2026Chlorine, total residual, monthly average< .02 mg/L≤ .019 mg/L5%
March 2026Coliform, fecal general, instantaneous maximum4200 CFU/100mL≤ 1000 CFU/100mL320%
April 2026Chlorine, total residual, instantaneous maximum.02 mg/L≤ .019 mg/L5%
May 2026Chlorine, total residual, instantaneous maximum.02 mg/L≤ .019 mg/L5%

Limits in force (15)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 3 mg/Lall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 25 mg/Lall year
Solids, total suspendedmonthly average≤ 2.8 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 20 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 2.2 lb/dall 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
Chlorine, total residualmonthly average≤ .019 mg/Lall year
Chlorine, total residualinstantaneous maximum≤ .019 mg/Lall year
Coliform, fecal generalgeometric mean≤ 200 CFU/100mLall year
Coliform, fecal generalinstantaneous maximum≤ 1000 CFU/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 2.2 lb/dall year

How strict are these limits?

Cited limits by parameter: Pennsylvania'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/PA0050474 · MCP: https://passage-data.com/mcp