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South Suburban Sanitary District

Sewage treatment plant, major discharger, Klamath Falls, Oregon. NPDES permit OR0023876 expired Aug 31, 2025; its limits still apply. Last 12 months: over a limit 3 times (last August 2026), 5 required values missing, 5 of 46 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (36 values), form G monthly (8 values), form M quarterly (2 values), form Q quarterly (5 values), form RW monthly (3 values), form AL yearly, and 1 more form
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 17 required values missing, 9 of 46 reports late

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

Period endingParameterReportedLimitOver by
July 2026BOD, 5-day, 20 deg. C, monthly average35.6 mg/L≤ 30 mg/L19%
July 2026BOD, 5-day, 20 deg. C, monthly average562.6 lb/d≤ 500 lb/d13%
August 2026BOD, 5-day, 20 deg. C, monthly average37.9 mg/L≤ 30 mg/L26%

Limits in force (60)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)Jun–Sep
Temperature, water deg. centigrademonthly averagereport only (deg C)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Temperature, water deg. centigradedaily maximum≤ 32 deg CJun–Sep
Temperature, water deg. centigradedaily maximum≤ 28 deg CJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Flow ratedaily averagereport only (cfs)all year
Oxygen, dissolved [DO]quarterly minimumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 500 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 1000 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 750 lb/dall year
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
pHmonthly minimumreport only (SU)all year
pHmonthly maximumreport 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≤ 85 mg/Lall year
Solids, total suspendedmonthly average≤ 1400 lb/dall year
Solids, total suspendeddaily maximum≤ 2800 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspendedweekly average≤ 130 mg/Lall year
Solids, total suspendedweekly average≤ 2300 lb/dall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)all year
Nitrogen, nitrate total [as N]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]weekly averagereport only (mg/L)all year
Hardness, total [as CaCO3]monthly maximumreport only (mg/L)all year
Thallium, total [as Tl]quarterly maximumreport only (ug/L)all year
N-Nitrosodi-N-propylaminequarterly maximumreport only (ug/L)all year
Pentachlorophenolquarterly maximumreport only (ug/L)all year
Di[2-ethylhexyl] phthalate [DEHP]quarterly 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 averagereport only (mg/L)all year
Chlorine, total residualdaily maximum≤ 1 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
Nitrogen, Total As Nmonthly averagereport only (mg/L)all year
Nitrogen, Total As Ndaily maximumreport only (mg/L)all year
Nitrogen, Total As Nweekly averagereport only (mg/L)all year
Mercury, total recoverablemonthly averagereport only (ug/L)all year
Mercury, total recoverabledaily maximumreport only (ug/L)all year
BOD, 5-day, percent removalmonthly average minimum≥ 65 %all year
Solids, suspended percent removalmonthly average minimum≥ 65 %all year
Chlorine usagedaily maximumreport only (lb/d)all year
Report due [yrmoda]valuereport only (N=0;Y=1)all year
Report due [yrmoda]valuereport only (N=0;Y=1)all year
Report due [yrmoda]valuereport only (N=0;Y=1)all year
Report due [yrmoda]valuereport only (N=0;Y=1)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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OR0023876 · MCP: https://passage-data.com/mcp