UPPER GWYNEDD TWP MONTGOMERY CNTY

NPDES permit PA0023256 · Major POTW · effective, expires 2028-09-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

1values over a limit
40required values missing, on 2 form(s)
0of 17 forms filed late

Last period with anything received: 2026-06-30. Most often over: Coliform, fecal general (1).

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among PA permits in EPA's filings — check your permit).

Limits in force (77)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 7 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001pHINST MIN >= 6 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 1601 lb/d all year
001Solids, total suspendedWKLY AVG <= 2402 lb/d all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedMO AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= .65 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 1.95 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 35 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 105 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Hardness, total [as CaCO3]MO AVG report only all year
001Copper, total [as Cu]MO AVG report only all year
001Iron, dissolved [as Fe]MO AVG report only all year
001Zinc, total [as Zn]QRTR AVG report only all year
001Zinc, total [as Zn]DAILY MX report only all year
001Aluminum, total [as Al]MO AVG report only all year
001Selenium, total [as Se]QRTR AVG report only all year
001Selenium, total [as Se]DAILY MX report only all year
001Phosphate, ortho [as P]MO AVG <= 1 mg/L Jan, Feb, Nov, Dec
001Phosphate, ortho [as P]MO AVG <= .5 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Phosphate, ortho [as P]MO AVG <= 53 lb/d Jan, Feb, Nov, Dec
001Phosphate, ortho [as P]MO AVG <= 27 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
0014,4'-DDEQRTR AVG <= .049 ug/L all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001E. coliINST MAX report only all year
001Ultraviolet light transmittanceINST MIN report only all year
001Toxicity [chronic], Ceriodaphnia dubiaDAILY MX report only all year
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]DAILY MX report only all year
001Solids, total dissolvedQRTR AVG <= 1000 mg/L all year
001Coliform, fecal generalGEO MEAN <= 200 #/100mL all year
001Coliform, fecal generalINST MAX <= 1000 #/100mL all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 4.4 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 8.8 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 6.6 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 13.2 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 235 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 470 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 352 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 705 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001TU Static 7Day Chronic Ceriodaphnia dubiaDAILY MX report only all year
001Static 7Day Chronic Pimephales PromelasDAILY MX report only all year
002Oxygen demand, chem. [high level] [COD]ANNL AVG report only all year
002pHANNL AVG report only all year
002Solids, total suspendedANNL AVG report only all year
002Oil & GreaseANNL AVG report only all year
002Nitrogen, Kjeldahl, total [as N]ANNL AVG report only all year
002Phosphorus, total [as P]ANNL AVG report only all year
002Iron, dissolved [as Fe]ANNL AVG report only all year
002Coliform, fecal generalANNL AVG report only all year
002BOD, carbonaceous [5 day, 20 C]ANNL AVG report only all year
003Oxygen demand, chem. [high level] [COD]ANNL AVG report only all year
003pHANNL AVG report only all year
003Solids, total suspendedANNL AVG report only all year
003Oil & GreaseANNL AVG report only all year
003Nitrogen, Kjeldahl, total [as N]ANNL AVG report only all year
003Phosphorus, total [as P]ANNL AVG report only all year
003Iron, dissolved [as Fe]ANNL AVG report only all year
003Coliform, fecal generalANNL AVG report only all year
003BOD, carbonaceous [5 day, 20 C]ANNL AVG report only all year
004Oxygen demand, chem. [high level] [COD]ANNL AVG report only all year
004pHANNL AVG report only all year
004Solids, total suspendedANNL AVG report only all year
004Oil & GreaseANNL AVG report only all year
004Nitrogen, Kjeldahl, total [as N]ANNL AVG report only all year
004Phosphorus, total [as P]ANNL AVG report only all year
004Iron, dissolved [as Fe]ANNL AVG report only all year
004Coliform, fecal generalANNL AVG report only all year
004BOD, carbonaceous [5 day, 20 C]ANNL AVG report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states