COOS BAY, CITY OF

NPDES permit OR0023574 · Major POTW · administratively continued, expires 2025-05-31 · 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 2025-05-31 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

1values over a limit
0required values missing, on 0 form(s)
4of 22 forms filed late

Last period with anything received: 2026-07-31. Most often over: pH (1).

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 (54)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeDAILY MX report only all year
001Temperature, water deg. centigradeMX 7D AV report only all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 20 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 480 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMO AVG <= 900 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CDAILY MX <= 970 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CDAILY MX <= 1800 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 20 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMO AVG <= 900 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 480 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CDAILY MX report only Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CDAILY MX report only May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CWKLY AVG <= 30 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CWKLY AVG <= 730 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CWKLY AVG <= 1400 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMO MIN report only all year
001pHMO MAX report only all year
001Alkalinity, total [as CaCO3]VALUE report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedMO AVG <= 20 mg/L May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMO AVG <= 30 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedMO AVG <= 480 lb/d May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMO AVG <= 900 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedDAILY MX <= 970 lb/d May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedDAILY MX <= 1800 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedMO AVG <= 20 mg/L May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMO AVG <= 30 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedMO AVG <= 480 lb/d May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMO AVG <= 900 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedDAILY MX report only May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedDAILY MX report only Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedWKLY AVG <= 45 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedWKLY AVG <= 30 mg/L May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedWKLY AVG <= 1400 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedWKLY AVG <= 730 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]VALUE report only all year
001Coliform, fecal - % samples exceeding limitTOTAL <= 10 % all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualMO AVG <= .05 mg/L all year
001Chlorine, total residualDAILY MX <= .06 mg/L all year
001Enterococci - % samples exceeding limitTOTAL <= 10 % all year
001EnterococciMO GEO <= 35 #/100mL all year
001Coliform, fecal generalMO MED <= 14 #/100mL all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Chlorine usageMO AVG report only all year
001Chlorine usageDAILY MX 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