MIDDLESEX CNTY UTILITIES AUTH

NPDES permit NJ0020141 · Major POTW · administratively continued, expires 2020-06-30 · 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.

This permit expired on 2020-06-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

8values over a limit
0required values missing, on 0 form(s)
0of 20 forms filed late

Last period with anything received: 2026-06-30. Most often over: Solids, total suspended (6), Enterococci (1), Mercury, total recoverable (1).

Reporting

Reports are due about 26 days after each monitoring period ends (the most common figure among NJ permits in EPA's filings — check your permit).

Limits in force (172)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMINIMUM report only all year
001Temperature, water deg. centigradeMO AVG report only all year
001Temperature, water deg. centigradeMAXIMUM report only all year
001Temperature, water deg. centigradeMINIMUM report only all year
001Temperature, water deg. centigradeMO AVG report only all year
001Temperature, water deg. centigradeMAXIMUM report only all year
001Oxygen, dissolved [DO]MN WK AV >= 5 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 16692 kg/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 25038 kg/d 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 AV MN >= 85 % all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMINIMUM report only all year
001pHMAXIMUM report only all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 16692 kg/d all year
001Solids, total suspendedWKLY AVG <= 25038 kg/d all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedWKLY AVG report only all year
001Solids, total suspendedMO AV MN >= 85 % all year
001Oil & GreaseMO AVG <= 10 mg/L all year
001Oil & GreaseINST MAX <= 15 mg/L all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Cyanide, total [as CN]MO AVG <= 1820 ug/L all year
001Cyanide, total [as CN]DAILY MX <= 3117 ug/L all year
001Cyanide, total [as CN]MO AVG <= 1012 kg/d all year
001Cyanide, total [as CN]DAILY MX <= 1734 kg/d all year
001Arsenic, total recoverableMO AVG <= 8 ug/L all year
001Arsenic, total recoverableMO AVG report only all year
001Arsenic, total recoverableDAILY MX <= 8 ug/L all year
001Arsenic, total recoverableDAILY MX report only all year
001Arsenic, total recoverableMO AVG <= 4450 g/d all year
001Arsenic, total recoverableMO AVG report only all year
001Arsenic, total recoverableDAILY MX <= 4450 g/d all year
001Arsenic, total recoverableDAILY MX report only all year
001Selenium, total recoverableMO AVG report only all year
001Selenium, total recoverableDAILY MX <= 25.1 ug/L all year
001Selenium, total recoverableMO AVG report only all year
001Selenium, total recoverableDAILY MX <= 14000 g/d all year
001Zinc, total recoverableMO AVG report only all year
001Zinc, total recoverableDAILY MX <= 280 ug/L all year
001Zinc, total recoverableMO AVG report only all year
001Zinc, total recoverableDAILY MX <= 156000 g/d all year
001Chlorine produced oxidantsMO AVG report only all year
001Chlorine produced oxidantsDAILY MX report only all year
001Chlorine produced oxidantsMO AVG report only all year
001Chlorine produced oxidantsDAILY MX report only all year
001Chlorine produced oxidantsMO AVG <= .1 mg/L all year
001Chlorine produced oxidantsMO AVG report only all year
001Chlorine produced oxidantsDAILY MX <= .124 mg/L all year
001Chlorine produced oxidantsDAILY MX report only all year
001Chlorine produced oxidantsMO AVG <= 55.6 kg/d all year
001Chlorine produced oxidantsMO AVG report only all year
001Chlorine produced oxidantsDAILY MX <= 68.7 kg/d all year
001Chlorine produced oxidantsDAILY MX report only all year
001Chlorine produced oxidantsMO AVG <= .1 mg/L all year
001Chlorine produced oxidantsMO AVG report only all year
001Chlorine produced oxidantsDAILY MX <= .124 mg/L all year
001Chlorine produced oxidantsDAILY MX report only all year
001Chlorine produced oxidantsMO AVG report only all year
001Chlorine produced oxidantsMO AVG report only all year
001Chlorine produced oxidantsDAILY MX report only all year
001Chlorine produced oxidantsDAILY MX report only all year
001Chlorine produced oxidantsMO AVG <= .3 mg/L all year
001Chlorine produced oxidantsDAILY MX <= .4 mg/L all year
001Chlorine produced oxidantsMO AVG <= 163.1 kg/d all year
001Chlorine produced oxidantsDAILY MX <= 199.8 kg/d all year
001DichlorobromomethaneMO AVG report only all year
001DichlorobromomethaneDAILY MX <= 5 ug/L all year
001DichlorobromomethaneMO AVG report only all year
001DichlorobromomethaneDAILY MX <= 2780 g/d all year
001ChloroformMO AVG report only all year
001ChloroformDAILY MX <= 120 ug/L all year
001ChloroformMO AVG report only all year
001ChloroformDAILY MX <= 66500 g/d all year
001TolueneMO AVG report only all year
001TolueneMO AVG report only all year
001TolueneDAILY MX <= 16.9 ug/L all year
001TolueneDAILY MX <= 16.9 ug/L all year
001TolueneMO AVG report only all year
001TolueneMO AVG report only all year
001TolueneDAILY MX <= 5390 g/d all year
001TolueneDAILY MX <= 9385 g/d all year
001Methylene chlorideMO AVG report only all year
001Methylene chlorideDAILY MX <= 101 ug/L all year
001Methylene chlorideMO AVG report only all year
001Methylene chlorideDAILY MX <= 56300 g/d all year
001TetrachloroethyleneMO AVG report only all year
001TetrachloroethyleneDAILY MX <= 9 ug/L all year
001TetrachloroethyleneMO AVG report only all year
001TetrachloroethyleneDAILY MX <= 5000 g/d all year
0011,1,1-TrichloroethaneMO AVG report only all year
0011,1,1-TrichloroethaneDAILY MX <= 6 ug/L all year
0011,1,1-TrichloroethaneMO AVG report only all year
0011,1,1-TrichloroethaneDAILY MX <= 3340 g/d all year
0011,4-DichlorobenzeneMO AVG report only all year
0011,4-DichlorobenzeneDAILY MX <= 20 ug/L all year
0011,4-DichlorobenzeneMO AVG report only all year
0011,4-DichlorobenzeneDAILY MX <= 11100 g/d all year
001Di[2-ethylhexyl] phthalate [DEHP]MO AVG report only all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= 30.7 ug/L all year
001Di[2-ethylhexyl] phthalate [DEHP]MO AVG report only all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= 17100 g/d all year
001Di-n-butyl phthalateMO AVG report only all year
001Di-n-butyl phthalateDAILY MX <= 20 ug/L all year
001Di-n-butyl phthalateMO AVG report only all year
001Di-n-butyl phthalateDAILY MX <= 11100 g/d all year
001PhenolsMO AVG report only all year
001PhenolsDAILY MX <= 24500 ug/L all year
001PhenolsMO AVG report only all year
001PhenolsDAILY MX <= 13600 kg/d 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
001EnterococciMOAV GEO <= 35 #/100mL all year
001EnterococciINST MAX report only all year
001Mercury, total recoverableMO AVG report only all year
001Mercury, total recoverableMO AVG report only all year
001Mercury, total recoverableDAILY MX report only all year
001Mercury, total recoverableDAILY MX report only all year
001Mercury, total recoverableMO AVG <= 556 g/d all year
001Mercury, total recoverableMO AVG <= 556 g/d all year
001Mercury, total recoverableDAILY MX report only all year
001Mercury, total recoverableDAILY MX report only all year
001Mercury, total recoverableMO AVG <= 1 ug/L all year
001Mercury, total recoverableMO AVG <= 1 ug/L all year
001Mercury, total recoverableDAILY MX report only all year
001Mercury, total recoverableDAILY MX report only all year
001Mercury, total recoverableMO AVG report only all year
001Mercury, total recoverableMO AVG report only all year
001Mercury, total recoverableDAILY MX report only all year
001Mercury, total recoverableDAILY MX report only all year
001LC50 Static Renewal 96Hr Acute Americamysis bahia (formerly Mysidopsis bahia)MINIMUM >= 67 % all year
007Chlorine produced oxidantsMO AVG <= .1 mg/L all year
007Chlorine produced oxidantsMO AVG report only all year
007Chlorine produced oxidantsMO AVG report only all year
007Chlorine produced oxidantsDAILY MX <= .1 mg/L all year
007Chlorine produced oxidantsDAILY MX report only all year
007Chlorine produced oxidantsDAILY MX report only all year
007Chlorine produced oxidantsMO AVG <= 55.6 kg/d all year
007Chlorine produced oxidantsMO AVG report only all year
007Chlorine produced oxidantsMO AVG report only all year
007Chlorine produced oxidantsDAILY MX <= 55.6 kg/d all year
007Chlorine produced oxidantsDAILY MX report only all year
007Chlorine produced oxidantsDAILY MX report only all year
007Chlorine produced oxidantsMO AVG report only all year
007Chlorine produced oxidantsMO AVG report only all year
007Chlorine produced oxidantsMO AVG report only all year
007Chlorine produced oxidantsDAILY MX report only all year
007Chlorine produced oxidantsDAILY MX report only all year
007Chlorine produced oxidantsDAILY MX report only all year
007Chlorine produced oxidantsMO AVG report only all year
007Chlorine produced oxidantsMO AVG report only all year
007Chlorine produced oxidantsMO AVG report only all year
007Chlorine produced oxidantsDAILY MX <= 57.9 kg/d all year
007Chlorine produced oxidantsDAILY MX report only all year
007Chlorine produced oxidantsDAILY MX report only all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007EnterococciMOAV GEO <= 35 #/100mL all year
007EnterococciINST MAX report only all year
007Duration of dischargeMO TOTAL report only all year
007Flow, totalMO TOTAL 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