Passage Data · Check a report · Use it from your AI

Coos Bay, City of

Sewage treatment plant, major discharger, Coos Bay, Oregon. NPDES permit OR0023574, in force until Jul 31, 2031. Last 12 months: over a limit 2 times (last September 2026), 6 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Last report on file
September 2026
Oct 2024 – Sep 2025
14 values over a limit, 4 required values missing, 7 of 27 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
April 2026pH, minimum5.5 SU≥ 6 SU—
September 2026Solids, total suspended, weekly average34.3 mg/L≤ 30 mg/L14%

Limits in force (47)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigrademaximum 7-day averagereport only (deg C)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)May–Oct
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 480 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 900 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 960 lb/dMay–Oct
BOD, 5-day, 20 deg. Cdaily maximum≤ 1800 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 30 mg/LMay–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 730 lb/dMay–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 1400 lb/dJan, Feb, Mar, Apr, Nov, Dec
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
pHmonthly minimumreport only (SU)all year
pHmonthly maximumreport only (SU)all year
Alkalinity, total [as CaCO3]monthly maximumreport only (mg/L)all year
Solids, total suspendedmonthly average≤ 20 mg/LMay–Oct
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 480 lb/dMay–Oct
Solids, total suspendedmonthly average≤ 1300 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendeddaily maximum≤ 960 lb/dMay–Oct
Solids, total suspendeddaily maximum≤ 2600 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 30 mg/LMay–Oct
Solids, total suspendedweekly average≤ 1900 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 730 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly maximumreport only (mg/L)all year
Coliform, fecal - % samples exceeding limittotal≤ 10 %all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .05 mg/Lall year
Chlorine, total residualdaily maximum≤ .06 mg/Lall year
Enterococci - % samples exceeding limittotal≤ 10 %all year
Enterococcimonthly geometric mean≤ 35 #/100mLall year
Enterococcidaily maximumreport only (#/100mL)all year
Coliform, fecal generalmonthly median≤ 14 #/100mLall year
Coliform, fecal generaldaily maximumreport only (#/100mL)all year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
Chlorine usagemonthly averagereport only (lb/d)all year

How strict are these limits?

Cited limits by parameter: Oregon's rules and the federal ones.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OR0023574 · MCP: https://passage-data.com/mcp