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Kent County Wastewater Treatment Facility

Sewage treatment plant, major discharger, Milford, Delaware. NPDES permit DE0020338 expired Sep 30, 2022; its limits still apply. Last 12 months: over a limit 9 times (last May 2026), 50 required values missing, 1 of 10 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (50 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
5 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
November 2025Enterococci: group D, MF trans, M-E, EIA, daily maximum214.3 #/100mL≤ 104 #/100mL106%
January 2026Enterococci: group D, MF trans, M-E, EIA, daily maximum1723 #/100mL≤ 104 #/100mL1557%
January 2026Solids, total suspended, daily maximum155 mg/L≤ 23 mg/L574%
January 2026Solids, total suspended, daily maximum17511.33 lb/d≤ 3839 lb/d356%
February 2026Enterococci: group D, MF trans, M-E, EIA, daily maximum238.2 #/100mL≤ 104 #/100mL129%
March 2026Enterococci: group D, MF trans, M-E, EIA, daily maximum248.1 #/100mL≤ 104 #/100mL139%
April 2026Enterococci: group D, MF trans, M-E, EIA, daily maximum344 #/100mL≤ 104 #/100mL231%
April 2026Enterococci: group D, MF trans, M-E, EIA, geometric mean43 #/100mL≤ 33 #/100mL30%
May 2026Enterococci: group D, MF trans, M-E, EIA, daily maximum488.4 #/100mL≤ 104 #/100mL370%

Limits in force (58)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendeddaily average≤ 15 mg/Lall year
Solids, total suspendeddaily maximum≤ 23 mg/Lall year
Solids, total suspendeddaily average≤ 2504 lb/dall year
Solids, total suspendeddaily maximum≤ 3839 lb/dall year
Solids, total suspendeddaily averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Nitrogen, total [as N]daily averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]daily averagereport only (lb/d)all year
Nitrogen, total [as N]daily maximumreport only (lb/d)all year
Nitrogen, total [as N]12-month average≤ 327405 lb/yrall year
Phosphorus, total [as P]daily averagereport only (mg/L)May–Sep
Phosphorus, total [as P]daily averagereport only (mg/L)Jan, Feb, Mar, Apr, Oct, Nov, Dec
Phosphorus, total [as P]daily maximumreport only (mg/L)May–Sep
Phosphorus, total [as P]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Oct, Nov, Dec
Phosphorus, total [as P]daily average≤ 51 lb/dMay–Sep
Phosphorus, total [as P]daily averagereport only (lb/d)Jan, Feb, Mar, Apr, Oct, Nov, Dec
Phosphorus, total [as P]daily maximumreport only (lb/d)May–Sep
Phosphorus, total [as P]daily maximumreport only (lb/d)Jan, Feb, Mar, Apr, Oct, Nov, Dec
Phosphorus, total [as P]12-month average≤ 18615 lb/yrall year
Hardness, total [as CaCO3]daily averagereport only (ug/L)all year
Hardness, total [as CaCO3]daily maximumreport only (ug/L)all year
Hardness, total [as CaCO3]daily averagereport only (lb/d)all year
Hardness, total [as CaCO3]daily maximumreport only (lb/d)all year
Copper, total [as Cu]daily averagereport only (ug/L)all year
Copper, total [as Cu]daily maximumreport only (ug/L)all year
Copper, total [as Cu]daily averagereport only (lb/d)all year
Copper, total [as Cu]daily maximumreport only (lb/d)all year
Nickel, total [as Ni]daily averagereport only (ug/L)all year
Nickel, total [as Ni]daily maximumreport only (ug/L)all year
Nickel, total [as Ni]daily averagereport only (lb/d)all year
Nickel, total [as Ni]daily maximumreport only (lb/d)all year
Selenium, total [as Se]daily averagereport only (ug/L)all year
Selenium, total [as Se]daily maximumreport only (ug/L)all year
Selenium, total [as Se]daily averagereport only (lb/d)all year
Selenium, total [as Se]daily maximumreport only (lb/d)all year
Enterococci: group D, MF trans, M-E, EIAgeometric mean≤ 33 #/100mLall year
Enterococci: group D, MF trans, M-E, EIAdaily maximum≤ 104 #/100mLall year
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Mercury, total [as Hg]daily averagereport only (ug/L)all year
Mercury, total [as Hg]daily maximumreport only (ug/L)all year
Mercury, total [as Hg]daily averagereport only (lb/d)all year
Mercury, total [as Hg]daily maximumreport only (lb/d)all year
BOD, carbonaceous [5 day, 20 C]daily averagereport only (mg/L)May–Sep
BOD, carbonaceous [5 day, 20 C]daily averagereport only (mg/L)Jan, Feb, Mar, Apr, Oct, Nov, Dec
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)May–Sep
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Oct, Nov, Dec
BOD, carbonaceous [5 day, 20 C]daily average≤ 544 lb/dMay–Sep
BOD, carbonaceous [5 day, 20 C]daily averagereport only (lb/d)Jan, Feb, Mar, Apr, Oct, Nov, Dec
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (lb/d)May–Sep
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (lb/d)Jan, Feb, Mar, Apr, Oct, Nov, Dec
BOD, carbonaceous [5 day, 20 C]daily averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]12-month average≤ 198560 lb/yrall year

How strict are these limits?

Cited limits by parameter: Delaware'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/DE0020338 · MCP: https://passage-data.com/mcp