Town of Hillsborough

NPDES permit NC0026433 · Major POTW · effective, expires 2030-01-31 · 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

1values over a limit
47required values missing, on 13 form(s)
10of 32 forms filed late

Last period with anything received: 2026-07-31. Most often over: BOD, 5-day, 20 deg. C (1).

Reporting

Reports are due about 31 days after each monitoring period ends (the most common figure among NC permits in EPA's filings — check your permit).

Limits in force (59)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeDAILY MX report only all year
001Temperature, water deg. centigradeDAILY MX report only all year
001Temperature, water deg. centigradeDAILY MX report only all year
001ConductivityDAILY MX report only all year
001ConductivityDAILY MX report only all year
001Oxygen, dissolved [DO]DAILY MN >= 5 mg/L all year
001Oxygen, dissolved [DO]DAILY MX report only all year
001Oxygen, dissolved [DO]DAILY MX report only all year
001BOD, 5-day, 20 deg. C7 DA AVG <= 7.5 mg/L all year
001BOD, 5-day, 20 deg. C30DA AVG <= 5 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001pHDAILY MX report only all year
001pHDAILY MX report only all year
001Solids, total suspended7 DA AVG <= 45 mg/L all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]7 DA AVG <= 3 mg/L all year
001Nitrogen, ammonia total [as N]30DA AVG <= 1 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Phosphorus, total [as P]9B <= 2 mg/L all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Coliform, fecal MF, MFC broth, 44.5 CWK GEOMN <= 400 #/100mL all year
001Coliform, fecal MF, MFC broth, 44.5 CMO GEOMN <= 200 #/100mL all year
001Flow, in conduit or thru treatment plant30DA AVG <= 3 MGD all year
001Chlorine, total residualDAILY MX <= 19 ug/L all year
001Flow, totalDAILY MX report only all year
0D2Temperature, water deg. centigradeDAILY MX report only all year
0D2ConductivityDAILY MX report only all year
0D2Oxygen, dissolved [DO]DAILY MX report only all year
0D2pHDAILY MX report only all year
0D2Nitrogen, total [as N]DAILY MX report only all year
0D2Nitrogen, ammonia total [as N]DAILY MX report only all year
0D2Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
0D2Nitrite + Nitrate total [as N]DAILY MX report only all year
0D2Phosphorus, total [as P]DAILY MX report only all year
0U1Temperature, water deg. centigradeDAILY MX report only all year
0U1ConductivityDAILY MX report only all year
0U1Oxygen, dissolved [DO]DAILY MX report only all year
0U1pHDAILY MX report only all year
0U1Nitrogen, total [as N]DAILY MX report only all year
0U1Nitrogen, ammonia total [as N]DAILY MX report only all year
0U1Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
0U1Nitrite + Nitrate total [as N]DAILY MX report only all year
0U1Phosphorus, total [as P]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