SWINOMISH INDIAN TRIBAL COMMUN

NPDES permit WA0025062 · Minor POTW · administratively continued, expires 2017-06-30 · 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 2017-06-30 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

0values over a limit
0required values missing, on 0 form(s)
0of 18 forms filed late

Last period with anything received: 2026-08-31.

Reporting

Reports are due about 10 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (38)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMO MAX report only all year
001Oxygen, dissolved [DO]QC report only 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 <= 12.51 lb/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 18.77 lb/d all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001pHINST MIN >= 6 SU all year
001pHINST MAX <= 9 SU all year
001Alkalinity, total [as CaCO3]QB 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 <= 12.51 lb/d all year
001Solids, total suspendedWKLY AVG <= 18.77 lb/d all year
001Solids, total suspendedMO AVG report only all year
001Nitrogen, ammonia total [as N]QB report only all year
001Nitrogen, Kjeldahl, total [as N]QB report only all year
001Nitrite + Nitrate total [as N]QB report only all year
001Phosphorus, total [as P]QB report only all year
001Fecal coliform, MPN, EC med, 44.5 CMO GEO <= 14 #/100mL all year
001Fecal coliform, MPN, EC med, 44.5 CWB <= 14 #/100mL all year
001Floating solids, waste or visible foam-visualM6 <= 0 N=0;Y=1 all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantINST MAX report only all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Oil and grease visualQB <= 0 N=0;Y=1 all year
RECTemperature, water deg. centigradeMW report only Aug, Nov
RECTurbidityMW report only Aug, Nov
RECOxygen, dissolved [DO]INST MIN report only Aug, Nov
RECpHINST MIN report only Aug, Nov
RECpHINST MAX report only Aug, Nov
RECSalinityINST MIN report only Aug, Nov
RECSalinityINST MAX report only Aug, Nov
RECNitrogen, total [as N]MW report only Aug, Nov
RECNitrogen, ammonia total [as N]MW report only Aug, Nov
RECPhosphorus, total [as P]MW report only Aug, Nov
RECSolids, total dissolvedMW report only Aug, Nov

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