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Oak Tree Land Co

Sewerage Systems, West Middlesex, Pennsylvania. NPDES permit PA0101079 expired Jun 30, 2022; its limits still apply. Last 12 months: over a limit 17 times (last June 2026), 12 required values missing. Source: EPA ECHO, Oct 22, 2026.

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

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

All 17 values over a limit
Period endingParameterReportedLimitOver by
October 2025Coliform, fecal general, instantaneous maximum228000 CFU/100mL≤ 10000 CFU/100mL2180%
October 2025Nitrogen, ammonia total [as N], monthly average14.7 mg/L≤ 3 mg/L390%
November 2025Coliform, fecal general, geometric mean380896 CFU/100mL≤ 2000 CFU/100mL18945%
November 2025Coliform, fecal general, instantaneous maximum602000 CFU/100mL≤ 10000 CFU/100mL5920%
December 2025Coliform, fecal general, geometric mean178322 CFU/100mL≤ 2000 CFU/100mL8816%
December 2025Coliform, fecal general, instantaneous maximum242000 CFU/100mL≤ 10000 CFU/100mL2320%
January 2026Coliform, fecal general, geometric mean14285 CFU/100mL≤ 2000 CFU/100mL614%
January 2026Coliform, fecal general, instantaneous maximum17220 CFU/100mL≤ 10000 CFU/100mL72%
February 2026Coliform, fecal general, geometric mean23372 CFU/100mL≤ 2000 CFU/100mL1069%
February 2026Coliform, fecal general, instantaneous maximum43700 CFU/100mL≤ 10000 CFU/100mL337%
March 2026Coliform, fecal general, geometric mean12800 CFU/100mL≤ 2000 CFU/100mL540%
March 2026Coliform, fecal general, instantaneous maximum13500 CFU/100mL≤ 10000 CFU/100mL35%
May 2026Coliform, fecal general, geometric mean42000 CFU/100mL≤ 200 CFU/100mL20900%
May 2026Coliform, fecal general, instantaneous maximum52000 CFU/100mL≤ 1000 CFU/100mL5100%
June 2026Coliform, fecal general, geometric mean389000 CFU/100mL≤ 200 CFU/100mL—
June 2026Coliform, fecal general, instantaneous maximum529000 CFU/100mL≤ 1000 CFU/100mL52800%
June 2026Nitrogen, ammonia total [as N], monthly average5.3 mg/L≤ 3 mg/L77%

Limits in force (15)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 4 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 9 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 3 mg/LMay–Oct
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≤ .15 mg/Lall year
Chlorine, total residualinstantaneous maximum≤ .5 mg/Lall year
Coliform, fecal generalgeometric mean≤ 2000 CFU/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
Coliform, fecal generalgeometric mean≤ 200 CFU/100mLMay–Sep
Coliform, fecal generalinstantaneous maximum≤ 10000 CFU/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
Coliform, fecal generalinstantaneous maximum≤ 1000 CFU/100mLMay–Sep
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall 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/PA0101079 · MCP: https://passage-data.com/mcp