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Umatilla, City of

Sewage treatment plant, Umatilla, Oregon. NPDES permit OR0022306, in force until Dec 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (27 values), form G monthly (6 values), form Q quarterly (1 value), form RW quarterly (4 values)
Renewal application due
Jul 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 35 reports late

Limits in force (48)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigradedaily averagereport only (deg C)all year
Temperature, water deg. centigradequarterly maximumreport only (deg C)all year
Temperature, water deg. centigrademaximum 7-day averagereport only (deg C)all year
Thermal Dischargemonthly average≤ 108 mkcal/dayJun–Oct
Thermal Dischargedaily maximumreport only (mkcal/day)Jun–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 200 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 130 lb/dMay–Oct
BOD, 5-day, 20 deg. Cdaily maximum≤ 400 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 260 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
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≤ 200 lb/dMay–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 300 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
pHquarterly 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≤ 20 mg/LMay–Oct
Solids, total suspendedmonthly average≤ 200 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 130 lb/dMay–Oct
Solids, total suspendeddaily maximum≤ 400 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendeddaily maximum≤ 260 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≤ 30 mg/LMay–Oct
Solids, total suspendedweekly average≤ 300 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 200 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]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
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
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/OR0022306 · MCP: https://passage-data.com/mcp