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GCP Countryside LP

Sewerage Systems, Mckean, Pennsylvania. NPDES permit PA0102652, in force until May 31, 2030. Last 12 months: over a limit 4 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (18 values), form Q quarterly (1 value)
Last report on file
September 2026
Oct 2024 – Sep 2025
3 values over a limit, 0 required values missing, 0 of 14 reports late

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

Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], instantaneous maximum5.1 mg/L≤ 5 mg/L2%
October 2025Nitrogen, ammonia total [as N], monthly average3.2 mg/L≤ 2.5 mg/L28%
January 2026Phosphorus, total [as P], monthly average1.2 mg/L≤ 1 mg/L20%
April 2026Phosphorus, total [as P], monthly average1.1 mg/L≤ 1 mg/L10%

Limits in force (23)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 4 mg/Lall year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedinstantaneous maximum≤ 60 mg/Lall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 2.5 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 7.5 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]instantaneous maximum≤ 5 mg/LMay–Oct
Nitrogen, ammonia total [as N]instantaneous maximum≤ 15 mg/LJan, Feb, Mar, Apr, Nov, Dec
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year
Phosphorus, total [as P]instantaneous maximum≤ 2 mg/Lall 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≤ .1 mg/Lall year
Chlorine, total residualinstantaneous maximum≤ .35 mg/Lall year
E. coliinstantaneous maximumreport only (#/100mL)all year
Coliform, fecal generalgeometric mean≤ 200 #/100mLMay–Sep
Coliform, fecal generalgeometric mean≤ 2000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
Coliform, fecal generalinstantaneous maximum≤ 1000 #/100mLMay–Sep
Coliform, fecal generalinstantaneous maximum≤ 10000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]instantaneous maximum≤ 50 mg/Lall year

New limits from Jun 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrogen, ammonia total [as N], monthly average1.4 mg/L (May–Oct)tighter1.8 mg/L (3 values)1.29×
Nitrogen, ammonia total [as N], monthly average4.2 mg/L (Jan, Feb, Mar, Apr, Nov, Dec)tighter4.6 mg/L (5 values)1.1×
Nitrogen, ammonia total [as N], instantaneous maximum2.8 mg/L (May–Oct)tighter2.4 mg/L (3 values)0.857×
Nitrogen, ammonia total [as N], instantaneous maximum8.4 mg/L (Jan, Feb, Mar, Apr, Nov, Dec)tighter5.3 mg/L (5 values)0.631×

How strict are these limits?

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

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Your permit document is the final word. As JSON: /api/v1/permits/PA0102652 · MCP: https://passage-data.com/mcp