KENNETT SQUARE BORO CHESTER CNTY

NPDES permit PA0024058 · Major POTW · effective, expires 2027-02-28 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

48values over a limit
34required values missing, on 9 form(s)
5of 15 forms filed late

Last period with anything received: 2026-06-30. Most often over: Nitrogen, total [as N] (15), Phosphorus, total [as P] (7), Zinc, total [as Zn] (7).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (88)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 6 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CWKLY AVG report only all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CWKLY 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 <= 275 lb/d all year
001Solids, total suspendedWKLY AVG <= 412 lb/d all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedWKLY AVG report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedWKLY AVG report only all year
001Nitrogen, total [as N]MO AVG <= 10 mg/L all year
001Nitrogen, total [as N]DAILY MX <= 20 mg/L all year
001Nitrogen, total [as N]MO AVG <= 91.8 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG <= 2 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 6 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 18 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 55 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Phosphorus, total [as P]MO AVG <= 1.3 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]MO AVG <= 2 mg/L Jan, Feb, Mar, Nov, Dec
001Phosphorus, total [as P]MO AVG <= 12 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]MO AVG <= 18 lb/d Jan, Feb, Mar, Nov, Dec
001Cadmium, total [as Cd]MO AVG report only all year
001Copper, total [as Cu]MO AVG <= .0153 mg/L all year
001Copper, total [as Cu]DAILY MX <= .0239 mg/L all year
001Copper, total [as Cu]MO AVG <= .14 lb/d all year
001Copper, total [as Cu]DAILY MX <= .22 lb/d all year
001Silver, total [as Ag]DAILY MX report only all year
001Silver, total [as Ag]QRTR AVG report only all year
001Zinc, total [as Zn]MO AVG <= .131 mg/L all year
001Zinc, total [as Zn]DAILY MX <= .204 mg/L all year
001Zinc, total [as Zn]MO AVG <= 1.2 lb/d all year
001Zinc, total [as Zn]DAILY MX <= 1.87 lb/d all year
001Aluminum, total [as Al]QRTR AVG report only all year
001Aluminum, total [as Al]DAILY MX report only all year
001Phenolics, total recoverableMO AVG <= .023 mg/L all year
001Phenolics, total recoverableDAILY MX <= .046 mg/L all year
001Phenolics, total recoverableMO AVG <= .21 lb/d all year
001Phenolics, total recoverableDAILY MX <= .42 lb/d all year
0012,4-DinitrophenolQRTR AVG report only all year
0012,4-DinitrophenolDAILY MX report only all year
0013,3'-DichlorobenzidineDAILY MX report only all year
0013,3'-DichlorobenzidineQRTR AVG report only all year
0014,6-Dinitro-o-cresolDAILY MX report only all year
0014,6-Dinitro-o-cresolQRTR AVG report only all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX report only all year
001Di[2-ethylhexyl] phthalate [DEHP]QRTR AVG report only all year
001BenzidineDAILY MX report only all year
001BenzidineQRTR AVG report only all year
001HexachlorobutadieneDAILY MX report only all year
001HexachlorobutadieneQRTR AVG report only all year
001Ultraviolet light intensityMO AVG report only 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. coliMO AVG report only all year
001Cyanide, free availableDAILY MX report only all year
001Cyanide, free availableQRTR AVG 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 report only all year
001Coliform, fecal generalGEO MEAN <= 200 CFU/100mL all year
001Coliform, fecal generalINST MAX <= 1000 CFU/100mL all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 17 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]WKLY AVG <= 25 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 230 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 152 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 365 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 228 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG report only all year
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
002BOD, 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