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Kennett Square Boro Chester Cnty

Sewage treatment plant, major discharger, Kennett Square, Pennsylvania. NPDES permit PA0024058, in force until Feb 28, 2027. Last 12 months: over a limit 45 times (last June 2026), 78 required values missing, 3 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (49 values), outfall 001 form Q quarterly (23 values), outfall 002 form Y yearly
Renewal application due
Sep 1, 2026 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
34 values over a limit, 79 required values missing, 12 of 17 reports late

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

All 45 values over a limit
Period endingParameterReportedLimitOver by
October 2025Coliform, fecal general, geometric mean940.8 CFU/100mL≤ 200 CFU/100mL370%
October 2025Coliform, fecal general, instantaneous maximum68670 CFU/100mL≤ 1000 CFU/100mL6767%
October 2025Nitrogen, total [as N], daily maximum37.16 mg/L≤ 20 mg/L86%
October 2025Nitrogen, total [as N], monthly average161.65≤ 91.8 lb/d76%
October 2025Nitrogen, total [as N], monthly average37.16 mg/L≤ 10 mg/L272%
October 2025Solids, total suspended, monthly average6150.11≤ 275 lb/d2136%
October 2025Solids, total suspended, monthly average< 1413.56 mg/L≤ 30 mg/L4612%
October 2025Solids, total suspended, weekly average6150.11≤ 412 lb/d1393%
October 2025Solids, total suspended, weekly average< 1413.56 mg/L≤ 45 mg/L3041%
November 2025Zinc, total [as Zn], daily maximum.5 mg/L≤ .204 mg/L145%
November 2025Zinc, total [as Zn], daily maximum2.38≤ 1.87 lb/d27%
November 2025Zinc, total [as Zn], monthly average.277 mg/L≤ .131 mg/L111%
November 2025Zinc, total [as Zn], monthly average1.3≤ 1.2 lb/d8%
December 2025Copper, total [as Cu], daily maximum.0325 mg/L≤ .0239 mg/L36%
December 2025Copper, total [as Cu], monthly average.0325 mg/L≤ .0153 mg/L112%
December 2025Copper, total [as Cu], monthly average.17≤ .14 lb/d21%
December 2025Nitrogen, total [as N], monthly average< 14.85 mg/L≤ 10 mg/L48%
January 2026Copper, total [as Cu], daily maximum.055 mg/L≤ .0239 mg/L130%
January 2026Copper, total [as Cu], daily maximum.284≤ .22 lb/d29%
January 2026Copper, total [as Cu], monthly average.055 mg/L≤ .0153 mg/L259%
January 2026Copper, total [as Cu], monthly average.284≤ .14 lb/d103%
January 2026Nitrogen, ammonia total [as N], monthly average8.07 mg/L≤ 6 mg/L35%
January 2026Nitrogen, total [as N], monthly average< 16.14 mg/L≤ 10 mg/L61%
January 2026Phosphorus, total [as P], monthly average2.82 mg/L≤ 2 mg/L41%
January 2026Zinc, total [as Zn], daily maximum.319 mg/L≤ .204 mg/L56%
January 2026Zinc, total [as Zn], monthly average.319 mg/L≤ .131 mg/L144%
January 2026Zinc, total [as Zn], monthly average1.65≤ 1.2 lb/d38%
February 2026Nitrogen, total [as N], monthly average< 12.27 mg/L≤ 10 mg/L23%
March 2026Nitrogen, total [as N], monthly average93.88≤ 91.8 lb/d2%
March 2026Nitrogen, total [as N], monthly average< 15.08 mg/L≤ 10 mg/L51%
April 2026Coliform, fecal general, instantaneous maximum1299.7 CFU/100mL≤ 1000 CFU/100mL30%
April 2026Nitrogen, ammonia total [as N], monthly average16.19 mg/L≤ 6 mg/L170%
April 2026Nitrogen, ammonia total [as N], monthly average91.04≤ 55 lb/d66%
April 2026Nitrogen, total [as N], daily maximum32.57 mg/L≤ 20 mg/L63%
April 2026Nitrogen, total [as N], monthly average183.14≤ 91.8 lb/d99%
April 2026Nitrogen, total [as N], monthly average32.57 mg/L≤ 10 mg/L226%
April 2026Phosphorus, total [as P], monthly average19.89≤ 12 lb/d66%
April 2026Phosphorus, total [as P], monthly average3.54 mg/L≤ 1.3 mg/L172%
May 2026Nitrogen, ammonia total [as N], monthly average48≤ 18 lb/d167%
May 2026Nitrogen, ammonia total [as N], monthly average8.6 mg/L≤ 2 mg/L330%
May 2026Nitrogen, total [as N], monthly average13 mg/L≤ 10 mg/L30%
May 2026Phosphorus, total [as P], monthly average20≤ 12 lb/d67%
May 2026Phosphorus, total [as P], monthly average3.5 mg/L≤ 1.3 mg/L169%
June 2026Phosphorus, total [as P], monthly average12.48≤ 12 lb/d4%
June 2026Phosphorus, total [as P], monthly average2.33 mg/L≤ 1.3 mg/L79%

Limits in force (88)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year001
BOD, 5-day, 20 deg. Cweekly 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≤ 275 lb/dall year001
Solids, total suspendedweekly average≤ 412 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendedweekly averagereport only (mg/L)all year001
Solids, total suspendedmonthly averagereport only (lb/d)all year001
Solids, total suspendedweekly averagereport only (lb/d)all year001
Nitrogen, total [as N]monthly average≤ 10 mg/Lall year001
Nitrogen, total [as N]daily maximum≤ 20 mg/Lall year001
Nitrogen, total [as N]monthly average≤ 91.8 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 6 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 18 lb/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 55 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Phosphorus, total [as P]monthly average≤ 1.3 mg/LApr–Oct001
Phosphorus, total [as P]monthly average≤ 2 mg/LJan, Feb, Mar, Nov, Dec001
Phosphorus, total [as P]monthly average≤ 12 lb/dApr–Oct001
Phosphorus, total [as P]monthly average≤ 18 lb/dJan, Feb, Mar, Nov, Dec001
Cadmium, total [as Cd]monthly averagereport only (mg/L)all year001
Copper, total [as Cu]monthly average≤ .0153 mg/Lall year001
Copper, total [as Cu]daily maximum≤ .0239 mg/Lall year001
Copper, total [as Cu]monthly average≤ .14 lb/dall year001
Copper, total [as Cu]daily maximum≤ .22 lb/dall year001
Silver, total [as Ag]daily maximumreport only (mg/L)all year001
Silver, total [as Ag]quarterly averagereport only (mg/L)all year001
Zinc, total [as Zn]monthly average≤ .131 mg/Lall year001
Zinc, total [as Zn]daily maximum≤ .204 mg/Lall year001
Zinc, total [as Zn]monthly average≤ 1.2 lb/dall year001
Zinc, total [as Zn]daily maximum≤ 1.87 lb/dall year001
Aluminum, total [as Al]quarterly averagereport only (mg/L)all year001
Aluminum, total [as Al]daily maximumreport only (mg/L)all year001
Phenolics, total recoverablemonthly average≤ .023 mg/Lall year001
Phenolics, total recoverabledaily maximum≤ .046 mg/Lall year001
Phenolics, total recoverablemonthly average≤ .21 lb/dall year001
Phenolics, total recoverabledaily maximum≤ .42 lb/dall year001
2,4-Dinitrophenolquarterly averagereport only (mg/L)all year001
2,4-Dinitrophenoldaily maximumreport only (mg/L)all year001
3,3'-Dichlorobenzidinedaily maximumreport only (mg/L)all year001
3,3'-Dichlorobenzidinequarterly averagereport only (mg/L)all year001
4,6-Dinitro-o-cresoldaily maximumreport only (mg/L)all year001
4,6-Dinitro-o-cresolquarterly averagereport only (mg/L)all year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximumreport only (mg/L)all year001
Di[2-ethylhexyl] phthalate [DEHP]quarterly averagereport only (mg/L)all year001
Benzidinedaily maximumreport only (mg/L)all year001
Benzidinequarterly averagereport only (mg/L)all year001
Hexachlorobutadienedaily maximumreport only (mg/L)all year001
Hexachlorobutadienequarterly averagereport only (mg/L)all year001
Ultraviolet light intensitymonthly averagereport only (mW/cm2)all year001
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. colimonthly averagereport only (#/100mL)all year001
Cyanide, free availabledaily maximumreport only (mg/L)all year001
Cyanide, free availablequarterly averagereport only (mg/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 averagereport only (mg/L)all year001
Coliform, fecal generalgeometric mean≤ 200 CFU/100mLall year001
Coliform, fecal generalinstantaneous maximum≤ 1000 CFU/100mLall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 17 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 25 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 230 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 152 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 365 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 228 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year001
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (mg/L)all year001
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all year001
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (lb/d)all year001
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]annual averagereport only (mg/L)all year002
pHannual averagereport only (SU)all year002
Solids, total suspendedannual averagereport only (mg/L)all year002
Oil & Greaseannual averagereport only (mg/L)all year002
Nitrogen, Kjeldahl, total [as N]annual averagereport only (mg/L)all year002
Phosphorus, total [as P]annual averagereport only (mg/L)all year002
Iron, dissolved [as Fe]annual averagereport only (mg/L)all year002
BOD, carbonaceous [5 day, 20 C]annual averagereport only (mg/L)all year002

How strict are these limits?

Cited limits by parameter: Pennsylvania's rules and the federal ones.

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Your permit document is the final word. As JSON: /api/v1/permits/PA0024058 · MCP: https://passage-data.com/mcp