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Ambler Boro Montgomery Cnty

Sewage treatment plant, major discharger, Ambler, Pennsylvania. NPDES permit PA0026603, in force until Jun 30, 2030. Last 12 months: over a limit once (last February 2026), 82 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (37 values), outfall 001 form Q quarterly (9 values), outfall 002 form Y yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
2 values over a limit, 5 required values missing, 0 of 18 reports late

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

Period endingParameterReportedLimitOver by
February 2026Nitrogen, ammonia total [as N], monthly average4.7 mg/L≤ 4.5 mg/L4%

Limits in force (63)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 7 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year001
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 1626 lb/dall year001
Solids, total suspendedweekly average≤ 2439 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendedmonthly averagereport only (lb/d)all year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 4.5 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 81 lb/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 244 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year001
Nitrite + Nitrate total [as N]monthly averagereport only (lb/d)all year001
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year001
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year001
Copper, total [as Cu]monthly averagereport only (mg/L)all year001
Copper, total [as Cu]weekly averagereport only (mg/L)all year001
Thallium, total [as Tl]quarterly averagereport only (ug/L)all year001
Zinc, total [as Zn]quarterly averagereport only (mg/L)all year001
Antimony, total [as Sb]quarterly averagereport only (ug/L)all year001
Aluminum, total [as Al]monthly average≤ 1.538 mg/Lall year001
Aluminum, total [as Al]daily maximum≤ 2.5 mg/Lall year001
Aluminum, total [as Al]monthly average≤ 83.3 lb/dall year001
Aluminum, total [as Al]daily maximum≤ 135.5 lb/dall year001
Phosphate, ortho [as P]monthly average≤ 4 mg/LJan, Feb, Mar, Nov, Dec001
Phosphate, ortho [as P]monthly average≤ 1 mg/LApr–Oct001
Phosphate, ortho [as P]monthly average≤ 216.8 lb/dJan, Feb, Mar, Nov, Dec001
Phosphate, ortho [as P]monthly average≤ 54.2 lb/dApr–Oct001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
E. coliinstantaneous maximumreport only (#/100mL)all year001
Ultraviolet light transmittanceinstantaneous minimumreport only (%)all year001
Cyanide, free availablequarterly averagereport only (ug/L)all year001
Toxicity [chronic], Ceriodaphnia dubiadaily maximumreport only (tox chronic)all year001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]daily maximumreport only (tox chronic)all year001
Solids, total dissolvedquarterly average≤ 1000 mg/Lall year001
Coliform, fecal generalgeometric mean≤ 200 #/100mLall year001
Coliform, fecal generalinstantaneous maximum≤ 1000 #/100mLall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 14.6 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 7.3 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 21.9 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 10.95 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 791.5 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 395.7 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 1187.2 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 593.6 lb/dMay–Oct001
TU Static 7Day Chronic Ceriodaphnia dubiadaily maximumreport only (tox chronic)all year001
Static 7Day Chronic Pimephales Promelasdaily maximumreport only (tox chronic)all year001
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year002
pHdaily maximumreport only (SU)all year002
Solids, total suspendeddaily maximumreport only (mg/L)all year002
Oil & Greasedaily maximumreport only (mg/L)all year002
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year002
Phosphorus, total [as P]daily maximumreport only (mg/L)all year002
Iron, dissolved [as Fe]daily maximumreport only (mg/L)all year002
Coliform, fecal generaldaily maximumreport only (#/100mL)all year002
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all year002

New limits from Jul 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Cyanide, free available, monthly average5.31 ug/Lnew——
Cyanide, free available, monthly average0.33 lb/dnew——
Phosphate, ortho [as P], monthly average1 mg/L (Apr–Oct)tighter0.69 mg/L (4 values)0.69×
Phosphate, ortho [as P], monthly average64.22 lb/d (Apr–Oct)tighter19.7 lb/d (4 values)0.307×
Thallium, total [as Tl], monthly average2 ug/Lnew——
Thallium, total [as Tl], monthly average0.125 lb/dnew——

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/PA0026603 · MCP: https://passage-data.com/mcp