Midway Sewer District

NPDES permit WA0020958 · Major POTW · administratively continued, expires 2020-11-30 · 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 2020-11-30 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 37 forms filed late

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

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 (88)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CAVERAGE <= 30 mg/L all year
001BOD, 5-day, 20 deg. CAVERAGE <= 30 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
001BOD, 5-day, 20 deg. CAVERAGE <= 2252 lb/d all year
001BOD, 5-day, 20 deg. CAVERAGE <= 2252 lb/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 3378 lb/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 3378 lb/d all year
001Solids, total suspendedAVERAGE <= 30 mg/L all year
001Solids, total suspendedAVERAGE <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedAVERAGE <= 2252 lb/d all year
001Solids, total suspendedAVERAGE <= 2252 lb/d all year
001Solids, total suspendedWKLY AVG <= 3378 lb/d all year
001Solids, total suspendedWKLY AVG <= 3378 lb/d all year
001Nitrogen, ammonia total [as N]AVERAGE report only (alert) all year
001Nitrogen, ammonia total [as N]AVERAGE report only (alert) all year
001Nitrogen, Kjeldahl, total [as N]AVERAGE report only (alert) all year
001Nitrogen, Kjeldahl, total [as N]AVERAGE report only (alert) all year
001Nitrite + Nitrate total [as N]AVERAGE report only (alert) all year
001Nitrite + Nitrate total [as N]AVERAGE report only (alert) all year
001Phosphorus, total [as P]AVERAGE report only (alert) all year
001Phosphorus, total [as P]AVERAGE report only (alert) all year
001Phosphorus, dissolved reactive [drp as P]AVERAGE report only (alert) all year
001Phosphorus, dissolved reactive [drp as P]AVERAGE report only (alert) all year
001Chlorine, total residualAVERAGE <= 360 ug/L all year
001Chlorine, total residualAVERAGE <= 360 ug/L all year
001BOD, percent removal [total]MO AV MN >= 85 % all year
001BOD, percent removal [total]MO AV MN >= 85 % all year
001pH, maximumDAILY MX <= 9 SU all year
001pH, maximumDAILY MX <= 9 SU all year
001pH, minimumDAILY MN >= 6 SU all year
001pH, minimumDAILY MN >= 6 SU all year
001Coliform, fecal generalMO GEOMN <= 200 #/100mL all year
001Coliform, fecal generalMO GEOMN <= 200 #/100mL all year
001Coliform, fecal generalWK GEOMN <= 400 #/100mL all year
001Coliform, fecal generalWK GEOMN <= 400 #/100mL all year
001FlowAVERAGE report only (alert) all year
001FlowAVERAGE report only (alert) all year
001FlowMAXIMUM report only (alert) all year
001FlowMAXIMUM report only (alert) all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
BPBBOD, 5-day, 20 deg. CAVERAGE report only (alert) all year
BPBBOD, 5-day, 20 deg. CAVERAGE report only (alert) all year
BPBBOD, 5-day, 20 deg. CAVERAGE report only (alert) all year
BPBBOD, 5-day, 20 deg. CAVERAGE report only (alert) all year
BPBSolids, total suspendedAVERAGE report only (alert) all year
BPBSolids, total suspendedAVERAGE report only (alert) all year
BPBSolids, total suspendedAVERAGE report only (alert) all year
BPBSolids, total suspendedAVERAGE report only (alert) all year
BPBRainfallTOTAL report only (alert) all year
BPBRainfallTOTAL report only (alert) all year
BPBDurationTOTAL report only (alert) all year
BPBDurationTOTAL report only (alert) all year
BPBChlorine, total residualMAXIMUM report only (alert) all year
BPBChlorine, total residualMAXIMUM report only (alert) all year
BPBVolume, totalTOTAL report only (alert) all year
BPBVolume, totalTOTAL report only (alert) all year
BPBpH, maximumMAXIMUM report only (alert) all year
BPBpH, maximumMAXIMUM report only (alert) all year
BPBpH, minimumMINIMUM report only (alert) all year
BPBpH, minimumMINIMUM report only (alert) all year
BPBColiform, fecal generalMO GEOMN report only (alert) all year
BPBColiform, fecal generalMO GEOMN report only (alert) all year
BPBFlowAVERAGE report only (alert) all year
BPBFlowAVERAGE report only (alert) all year
IN1BOD, 5-day, 20 deg. CAVERAGE report only (alert) all year
IN1BOD, 5-day, 20 deg. CAVERAGE report only (alert) all year
IN1BOD, 5-day, 20 deg. CMAXIMUM report only (alert) all year
IN1BOD, 5-day, 20 deg. CMAXIMUM report only (alert) all year
IN1BOD, 5-day, 20 deg. CAVERAGE report only (alert) all year
IN1BOD, 5-day, 20 deg. CAVERAGE report only (alert) all year
IN1BOD, 5-day, 20 deg. CMAXIMUM report only (alert) all year
IN1BOD, 5-day, 20 deg. CMAXIMUM report only (alert) all year
IN1Solids, total suspendedAVERAGE report only (alert) all year
IN1Solids, total suspendedAVERAGE report only (alert) all year
IN1Solids, total suspendedMAXIMUM report only (alert) all year
IN1Solids, total suspendedMAXIMUM report only (alert) all year
IN1Solids, total suspendedAVERAGE report only (alert) all year
IN1Solids, total suspendedAVERAGE report only (alert) all year
IN1Solids, total suspendedMAXIMUM report only (alert) all year
IN1Solids, total suspendedMAXIMUM report only (alert) all year
IN1FlowAVERAGE report only (alert) all year
IN1FlowAVERAGE report only (alert) all year
IN1FlowMAXIMUM report only (alert) all year
IN1FlowMAXIMUM 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