SOUTHWEST HARBOR WATER & SEWER DISTRICT

NPDES permit ME0100641 · Major POTW · effective, expires 2026-11-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

0values over a limit
0required values missing, on 0 form(s)
2of 22 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (35)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 50 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 94 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 156 lb/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 141 lb/d all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 50 mg/L all year
001Solids, total suspendedMO AVG <= 94 lb/d all year
001Solids, total suspendedDAILY MX <= 156 lb/d all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedWKLY AVG <= 141 lb/d all year
001Solids, settleableDAILY MX <= .3 mL/L all year
001Coliform, fecal MF, MFC broth, 44.5 CMO GEO <= 14 #/100mL May, Jun, Jul, Aug, Sep
001Coliform, fecal MF, MFC broth, 44.5 CMO GEO <= 14 #/100mL all year
001Coliform, fecal MF, MFC broth, 44.5 CDAILY MX <= 31 #/100mL May, Jun, Jul, Aug, Sep
001Coliform, fecal MF, MFC broth, 44.5 CDAILY MX <= 31 #/100mL all year
001Flow, in conduit or thru treatment plantMO AVG <= .375 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualMO AVG <= .1 mg/L all year
001Chlorine, total residualDAILY MX <= .15 mg/L all year
001Analytical ChemistryVALUE report only all year
001Analytical ChemistryVALUE report only all year
001EnterococciMO GEO <= 8 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001EnterococciDAILY MX <= 54 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001Mercury, total [as Hg]MO AVG <= 24 ng/L all year
001Mercury, total [as Hg]DAILY MX <= 36 ng/L all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001NOEL Static 1Hr 20min Fert. Chronic Arbacia punctulataVALUE report only all year
001NOEL Static 1Hr 20min Fert. Chronic Arbacia punctulataVALUE report only all year
001Noael Static 48Hr Acute Mysid. BahiaVALUE report only all year
001Noael Static 48Hr Acute Mysid. BahiaVALUE 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