CONSHOHOCKEN BORO AUTH MONTGOMERY CNTY

NPDES permit PA0026794 · Major POTW · effective, expires 2027-07-31 · 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

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

Last period with anything received: 2026-06-30. Most often over: Coliform, fecal general (2).

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 (74)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 5 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 <= 575 lb/d all year
001Solids, total suspendedWKLY AVG <= 863 lb/d all year
001Solids, total suspendedMO AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 8 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 20 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 153 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 384 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Cadmium, total [as Cd]QRTR AVG report only all year
001Cadmium, total [as Cd]DAILY MX report only all year
001Copper, total [as Cu]MO AVG <= .0654 mg/L all year
001Copper, total [as Cu]DAILY MX <= .115 mg/L all year
001Copper, total [as Cu]MO AVG <= 1.25 lb/d all year
001Copper, total [as Cu]DAILY MX <= 2.22 lb/d all year
001Silver, total [as Ag]QRTR AVG report only all year
001Silver, total [as Ag]DAILY MX report only all year
001Zinc, total [as Zn]QRTR AVG report only all year
001Zinc, total [as Zn]DAILY MX report only all year
001HeptachlorMO AVG <= .0004 ug/L all year
001HeptachlorDAILY MX <= .0007 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
001Chlorine, total residualMO AVG <= .5 mg/L all year
001Chlorine, total residualINST MAX <= 1.6 mg/L all year
001E. coliINST MAX report only all year
001PCBs Wet Weather AnalysisDAILY MX report only all year
001PCBs Dry Weather AnalysisDAILY MX 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
001Mercury, total [as Hg]QRTR AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Coliform, fecal generalGEO MEAN <= 200 #/100mL May, Jun, Jul, Aug, Sep
001Coliform, fecal generalGEO MEAN <= 200 #/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
001Coliform, fecal generalINST MAX <= 1000 #/100mL May, Jun, Jul, Aug, Sep
001Coliform, fecal general9C <= 1000 #/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 20 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 30 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 40 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 384 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 480 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 575 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 767 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]DAILY MX report only all year
002pHDAILY MX report only all year
002Solids, total suspendedDAILY MX report only all year
002Oil & GreaseDAILY MX report only all year
002Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
002Phosphorus, total [as P]DAILY MX report only all year
002Iron, dissolved [as Fe]DAILY MX report only all year
002Coliform, fecal generalDAILY MX report only all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
003Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
003pHDAILY MX report only all year
003Solids, total suspendedDAILY MX report only all year
003Oil & GreaseDAILY MX report only all year
003Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
003Phosphorus, total [as P]DAILY MX report only all year
003Iron, dissolved [as Fe]DAILY MX report only all year
003Coliform, fecal generalDAILY MX report only all year
003BOD, carbonaceous [5 day, 20 C]DAILY MX 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