Grays Harbor County

NPDES permit WA0037095 · Minor POTW · effective, expires 2030-08-31 · 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.

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

0values over a limit
1required values missing, on 1 form(s)
0of 24 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 (48)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMAXIMUM report only (alert) Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Temperature, water deg. centigradeMO AVG report only (alert) Jun, Jul, Aug, Sep
001Temperature, water deg. centigradeMO AVG report only (alert) Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Oxygen, dissolved [DO]DAILY MN >= 8 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 20 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 25 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 24 lb/d Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMO AVG <= 64 lb/d Jan, Feb, Mar, Apr, May, Nov, Dec
001BOD, 5-day, 20 deg. CWKLY AVG <= 30 lb/d Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CWKLY AVG <= 80 lb/d Jan, Feb, Mar, Apr, May, Nov, Dec
001pHDAILY MN >= 6.5 SU Jun, Jul, Aug, Sep, Oct
001pHDAILY MN >= 6.3 SU Jan, Feb, Mar, Apr, May, Nov, Dec
001pHDAILY MX <= 9 SU Jun, Jul, Aug, Sep, Oct
001pHDAILY MX <= 9 SU Jan, Feb, Mar, Apr, May, Nov, Dec
001Solids, total suspendedMO AVG <= 20 mg/L all year
001Solids, total suspendedWKLY AVG <= 25 mg/L all year
001Solids, total suspendedMO AVG <= 24 lb/d Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMO AVG <= 64 lb/d Jan, Feb, Mar, Apr, May, Nov, Dec
001Solids, total suspendedWKLY AVG <= 32 lb/d Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedWKLY AVG <= 80 lb/d Jan, Feb, Mar, Apr, May, Nov, Dec
001Oil and grease, hexane extr methodSingle Rdg report only (alert) all year
001Nitrogen, ammonia total [as N]MO AVG <= 1 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 5 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 16 lb/d Jan, Feb, Mar, Apr, May, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 2.9 lb/d Jun, Jul, Aug, Sep, Oct
001Hardness, total [as CaCO3]AVERAGE report only (alert) all year
001Copper, total [as Cu]DAILY MX <= 7 ug/L all year
001BOD, percent removal [total]MO AV MN >= 85 % all year
001E. coliAVERAGE report only (alert) all year
001EnterococciAVERAGE report only (alert) all year
001Solids, total dissolvedSingle Rdg report only (alert) all year
001Coliform, fecal generalMO GEOMN <= 25 #/100mL Jun, Jul, Aug, Sep, Oct
001Coliform, fecal generalMO GEOMN <= 41 #/100mL Jan, Feb, Mar, Apr, May, Nov, Dec
001Coliform, fecal generalWK GEOMN <= 161 #/100mL Jun, Jul, Aug, Sep, Oct
001Coliform, fecal generalWK GEOMN <= 340 #/100mL Jan, Feb, Mar, Apr, May, Nov, Dec
001FlowMAXIMUM report only (alert) all year
001FlowMO AVG report only (alert) all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
INFBOD, 5-day, 20 deg. CMAXIMUM report only (alert) all year
INFBOD, 5-day, 20 deg. CMO AVG report only (alert) all year
INFBOD, 5-day, 20 deg. CMAXIMUM report only (alert) all year
INFBOD, 5-day, 20 deg. CMO AVG report only (alert) all year
INFSolids, total suspendedMAXIMUM report only (alert) all year
INFSolids, total suspendedMO AVG report only (alert) all year
INFSolids, total suspendedMAXIMUM report only (alert) all year
INFSolids, total suspendedMO AVG report only (alert) all year
INFFlowMAXIMUM report only (alert) all year
INFFlowMO AVG 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