Town of Winthrop

NPDES permit WA0020885 · Minor POTW · administratively continued, expires 2020-07-31 · 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.

This permit expired on 2020-07-31 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

14values over a limit
6required values missing, on 1 form(s)
0of 23 forms filed late

Last period with anything received: 2026-07-31. Most often over: BOD, 5-day, 20 deg. C (8), Solids, total suspended (3), Solids, suspended percent removal (2).

Reporting

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

Limits in force (87)

OutfallParameterStatisticLimitMonths
EFFLTemperature, water deg. centigradeMAXIMUM report only (alert) all year
EFFLTemperature, water deg. centigradeMAXIMUM report only (alert) all year
EFFLTemperature, water deg. centigradeMO AVG report only (alert) all year
EFFLTemperature, water deg. centigradeMO AVG report only (alert) all year
EFFLOxygen, dissolved [DO]MAXIMUM report only (alert) all year
EFFLOxygen, dissolved [DO]MAXIMUM report only (alert) all year
EFFLOxygen, dissolved [DO]MINIMUM report only (alert) all year
EFFLOxygen, dissolved [DO]MINIMUM report only (alert) all year
EFFLBOD, 5-day, 20 deg. CMAXIMUM report only all year
EFFLBOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
EFFLBOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
EFFLBOD, 5-day, 20 deg. CMAXIMUM report only all year
EFFLBOD, 5-day, 20 deg. CMO AVG <= 70 lb/d all year
EFFLBOD, 5-day, 20 deg. CWKLY AVG <= 105 lb/d all year
EFFLBOD, 5-day, 20 deg. CWKLY AVG <= 105 lb/d all year
EFFLpHDAILY MN >= 6 SU all year
EFFLpHDAILY MN >= 6 SU all year
EFFLpHDAILY MX <= 9 SU all year
EFFLpHDAILY MX <= 9 SU all year
EFFLSolids, total suspendedMAXIMUM report only all year
EFFLSolids, total suspendedMO AVG <= 56 mg/L all year
EFFLSolids, total suspendedWKLY AVG <= 84 mg/L all year
EFFLSolids, total suspendedMAXIMUM report only all year
EFFLSolids, total suspendedMO AVG <= 140 lb/d all year
EFFLSolids, total suspendedWKLY AVG <= 210 lb/d all year
EFFLSolids, total suspendedWKLY AVG <= 210 lb/d all year
EFFLOil and grease, hexane extr methodSingle Rdg report only (alert) Sep, Oct, Nov, Dec
EFFLOil and grease, hexane extr methodSingle Rdg report only (alert) Sep, Oct, Nov, Dec
EFFLNitrogen, ammonia total [as N]MO AVG report only (alert) all year
EFFLNitrogen, ammonia total [as N]MO AVG report only (alert) all year
EFFLNitrogen, Kjeldahl, total [as N]Single Rdg report only (alert) Sep, Oct, Nov, Dec
EFFLNitrogen, Kjeldahl, total [as N]Single Rdg report only (alert) Sep, Oct, Nov, Dec
EFFLNitrite + Nitrate total [as N]Single Rdg report only (alert) Sep, Oct, Nov, Dec
EFFLNitrite + Nitrate total [as N]Single Rdg report only (alert) Sep, Oct, Nov, Dec
EFFLPhosphorus, total [as P]Single Rdg report only (alert) Sep, Oct, Nov, Dec
EFFLPhosphorus, total [as P]Single Rdg report only (alert) Sep, Oct, Nov, Dec
EFFLHardness, total [as CaCO3]Single Rdg report only (alert) Sep, Oct, Nov, Dec
EFFLHardness, total [as CaCO3]Single Rdg report only (alert) Sep, Oct, Nov, Dec
EFFLChlorine, total residualMO AVG <= .12 mg/L all year
EFFLChlorine, total residualMO AVG <= .12 mg/L all year
EFFLChlorine, total residualMO AVG <= .3 lb/d all year
EFFLChlorine, total residualMO AVG <= .3 lb/d all year
EFFLChlorine, total residualMO AVG <= .3 lb/d all year
EFFLBOD, percent removal [total]MO AV MN >= 79 % all year
EFFLBOD, percent removal [total]MO AV MN >= 79 % all year
EFFLSolids, total dissolvedSingle Rdg report only (alert) Sep, Oct, Nov, Dec
EFFLSolids, total dissolvedSingle Rdg report only (alert) Sep, Oct, Nov, Dec
EFFLColiform, fecal generalMO GEOMN <= 100 #/100mL all year
EFFLColiform, fecal generalMO GEOMN <= 100 #/100mL all year
EFFLColiform, fecal generalWK GEOMN <= 200 #/100mL all year
EFFLColiform, fecal generalWK GEOMN <= 200 #/100mL all year
EFFLFlowMAXIMUM report only (alert) all year
EFFLFlowMAXIMUM report only (alert) all year
EFFLFlowMO AVG report only (alert) all year
EFFLFlowMO AVG report only (alert) all year
EFFLFlowMO TOTAL report only (alert) all year
EFFLFlowMO TOTAL report only (alert) all year
EFFLSolids, suspended percent removalMO AV MN >= 77 % all year
EFFLSolids, suspended percent removalMO AV MN >= 77 % all year
INFLTemperature, water deg. centigradeMAXIMUM report only (alert) all year
INFLTemperature, water deg. centigradeMAXIMUM report only (alert) all year
INFLTemperature, water deg. centigradeMO AVG report only (alert) all year
INFLTemperature, water deg. centigradeMO AVG report only (alert) all year
INFLOxygen, dissolved [DO]MAXIMUM report only (alert) all year
INFLOxygen, dissolved [DO]MAXIMUM report only (alert) all year
INFLOxygen, dissolved [DO]MINIMUM report only (alert) all year
INFLOxygen, dissolved [DO]MINIMUM report only (alert) all year
INFLBOD, 5-day, 20 deg. CMAXIMUM report only (alert) all year
INFLBOD, 5-day, 20 deg. CMAXIMUM report only (alert) all year
INFLBOD, 5-day, 20 deg. CMO AVG report only (alert) all year
INFLBOD, 5-day, 20 deg. CMO AVG report only (alert) all year
INFLBOD, 5-day, 20 deg. CAVERAGE report only (alert) all year
INFLBOD, 5-day, 20 deg. CAVERAGE report only (alert) all year
INFLBOD, 5-day, 20 deg. CMAXIMUM report only (alert) all year
INFLBOD, 5-day, 20 deg. CMAXIMUM report only (alert) all year
INFLpHMAXIMUM report only (alert) all year
INFLpHMAXIMUM report only (alert) all year
INFLpHMINIMUM report only (alert) all year
INFLpHMINIMUM report only (alert) all year
INFLSolids, total suspendedMAXIMUM report only (alert) all year
INFLSolids, total suspendedMAXIMUM report only (alert) all year
INFLSolids, total suspendedMO AVG report only (alert) all year
INFLSolids, total suspendedMO AVG report only (alert) all year
INFLSolids, total suspendedAVERAGE report only (alert) all year
INFLSolids, total suspendedAVERAGE report only (alert) all year
INFLSolids, total suspendedMAXIMUM report only (alert) all year
INFLSolids, total suspendedMAXIMUM report only (alert) 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