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Lafayette, City of

Sewage treatment plant, Lafayette, Oregon. NPDES permit OR0022551, in force until Mar 31, 2031. Last 12 months: over a limit 2 times (last September 2026), 4 of 36 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (33 values), form G monthly (4 values), form RW monthly (4 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
4 values over a limit, 2 required values missing, 3 of 36 reports late

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

Period endingParameterReportedLimitOver by
August 2026Excess thermal load, maximum 7-day average6.8 mkcal/day≤ 5.3 mkcal/day28%
September 2026Excess thermal load, maximum 7-day average6 mkcal/day≤ 5.3 mkcal/day13%

Limits in force (53)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigrademonthly maximumreport only (deg C)all year
Temperature, water deg. centigrademaximum 7-day averagereport only (deg C)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 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≤ 50 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 140 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 100 lb/dMay–Oct
BOD, 5-day, 20 deg. Cdaily maximum≤ 280 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly average≤ 15 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≤ 75 lb/dMay–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 210 lb/dJan, Feb, Mar, Apr, Nov, Dec
pHdaily minimum≥ 6.2 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]quarterly maximumreport only (mg/L)all year
Alkalinity, total [as CaCO3]quarterly maximumreport only (mg/L)all year
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 10 mg/LMay–Oct
Solids, total suspendedmonthly average≤ 140 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 50 lb/dMay–Oct
Solids, total suspendeddaily maximum≤ 280 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendeddaily maximum≤ 100 lb/dMay–Oct
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≤ 15 mg/LMay–Oct
Solids, total suspendedweekly average≤ 210 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 75 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 5.2 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 11 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 14 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 20.2 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]quarterly maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)May–Oct
Phosphorus, total [as P]monthly average≤ 1.2 lb/dMay–Oct
Phosphorus, total [as P]monthly averagereport only (mg/L)May–Oct
Phosphorus, total [as P]monthly average≤ 2.8 lb/dMay–Oct
Phosphorus, total [as P]monthly averagereport only (mg/L)May–Oct
Phosphorus, total [as P]monthly averagereport only (lb/d)May–Oct
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all 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 loadmaximum 7-day average≤ 5.3 mkcal/dayJun–Oct
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %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/OR0022551 · MCP: https://passage-data.com/mcp