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Klamath Falls, City of

Sewage treatment plant, major discharger, Klamath Falls, Oregon. NPDES permit OR0026301 expired Sep 30, 2025; its limits still apply. Last 12 months: over a limit 2 times (last August 2026), 2 required values missing, 1 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (35 values), form G monthly (6 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 47 required values missing, 11 of 25 reports late

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

Period endingParameterReportedLimit
July 2026pH range excursions, > 60 minutes, total3 occur/mo≤ 0 occur/mo
August 2026pH range excursions, > 60 minutes, total1 occur/mo≤ 0 occur/mo

Limits in force (58)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximum≤ 32 deg CJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Temperature, water deg. centigradedaily maximumreport only (deg C)Jun–Sep
Temperature, water deg. centigradedaily maximum≤ 28 deg CJun–Sep
BOD, 5-day, 20 deg. Csemi-annual average≤ 549 lb/dMay
BOD, 5-day, 20 deg. Csemi-annual average≤ 439 lb/dOct
pHdaily minimum≥ 6.5 SU (alert, not enforceable)all year
pHdaily maximum≤ 9 SU (alert, not enforceable)all year
pHdaily minimumreport only (SU)all year
pHdaily maximumreport only (SU)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≤ 580 lb/dMay–Oct
Solids, total suspendedmonthly average≤ 1500 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendeddaily maximum≤ 1160 lb/dMay–Oct
Solids, total suspendeddaily maximum≤ 3000 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly average≤ 30 mg/LMay–Oct
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 870 lb/dMay–Oct
Solids, total suspendedweekly average≤ 2250 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, total [as N]semi-annual average≤ 671 lb/dMay
Nitrogen, total [as N]semi-annual average≤ 556 lb/dOct
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]semi-annual averagereport only (lb/d)May
Phosphorus, total [as P]semi-annual averagereport only (lb/d)Oct
Hardness, total [as CaCO3]monthly maximumreport only (mg/L)all year
Copper, dissolved [as Cu]monthly maximumreport only (ug/L)all year
Copper, total [as Cu]monthly maximumreport only (ug/L)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≤ .05 mg/Lall year
E. colimonthly geometric mean≤ 126 #/100mLall year
E. colidaily maximum≤ 406 #/100mLall year
E. colimonthly geometric mean≤ 126 #/100mLall year
E. colidaily maximumreport only (#/100mL)all year
Excess thermal loaddaily maximumreport only (mkcal/day)all year
Mercury, total recoverablemonthly averagereport only (ug/L)all year
Mercury, total recoverabledaily maximumreport only (ug/L)all year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 16 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 470 lb/dMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 1300 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 940 lb/dMay–Oct
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 2600 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 27 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]weekly average≤ 790 lb/dMay–Oct
BOD, carbonaceous [5 day, 20 C]weekly average≤ 2000 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
Carbonaceous oxygen demand, % removalmonthly average minimum≥ 85 %all year
Chlorine usagedaily maximumreport only (lb/d)all year
pH range excursions, > 60 minutestotal≤ 0 occur/moall year
pH range excursions, monthly total accumtotal≤ 446 minall year

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OR0026301 · MCP: https://passage-data.com/mcp