SOUTH ESSEX SEWERAGE DISTRICT

NPDES permit MA0100501 · Major POTW · administratively continued, expires 2021-07-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2021-07-31 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

2values over a limit
0required values missing, on 0 form(s)
0of 15 forms filed late

Last period with anything received: 2026-08-31. Most often over: BOD, carbonaceous [5 day, 20 C] (1), Solids, total suspended (1).

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among MA permits in EPA's filings — check your permit).

Limits in force (43)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedMO AVG <= 7433 lb/d all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedWKLY AVG <= 11150 lb/d all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedMO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only Feb, Apr, Jun, Aug
001Hardness, total [as CaCO3]DAILY MX report only Feb, Apr, Jun, Aug
001Nickel, total recoverableDAILY MX report only Feb, Apr, Jun, Aug
001Zinc, total recoverableDAILY MX report only Feb, Apr, Jun, Aug
001Cadmium, total recoverableDAILY MX report only Feb, Apr, Jun, Aug
001Lead, total recoverableDAILY MX report only Feb, Apr, Jun, Aug
001Copper, total recoverableDAILY MX report only Feb, Apr, Jun, Aug
001Flow, in conduit or thru treatment plantROLL AVG <= 29.7 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX 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
001Chlorine, total residualDAILY MX <= .24 mg/L all year
001Nitrogen, Kjeldahl TotalDAILY MX report only all year
001Nitrite Plus Nitrate TotalDAILY MX report only all year
001EnterococciMO GEO <= 35 #/100mL all year
001EnterococciDAILY MX report only all year
001Coliform, fecal generalMO GEO <= 88 CFU/100mL all year
001Coliform, fecal generalDAILY MX report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 6194 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 9911 lb/d all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]MO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)DAILY MN >= 100 % Feb, Apr, Jun, Aug
001LC50 Static 48Hr Acute MenidiaDAILY MN >= 100 % Feb, Apr, Jun, Aug
001Noael Statre 7Day Chronic ArbaciaDAILY MN report only Feb, Apr, Jun, Aug
001Noael Statre 7Day Chronic MenidiaDAILY MN report only Feb, Apr, Jun, Aug

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