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Umatilla, City of

Sewerage Systems, Umatilla, Oregon. NPDES permit OR0044709 expired Jun 30, 2023; its limits still apply. 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 (13 values), form RW monthly (5 values), form TX quarterly (1 value)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (24)

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 maximumreport only (deg C)Apr–Nov
Flow ratedaily maximumreport only (cfs)Apr–Nov
Conductivitydaily maximumreport only (umho/cm)all year
Oxygen, dissolved [DO]valuereport only (mg/L)Apr
BOD, 5-day, 20 deg. Cvaluereport only (mg/L)Apr
Oxygen demand, chem. [COD], dissolvedvaluereport only (mg/L)Apr
pHdaily minimum≥ 4.5 SUall year
pHdaily maximum≤ 9 SUall year
pHmonthly maximumreport only (SU)Apr–Nov
Alkalinity, total [as CaCO3]monthly maximumreport only (mg/L)all year
Alkalinity, total [as CaCO3]monthly maximumreport only (mg/L)Apr–Nov
Solids, total suspendedvaluereport only (mg/L)Apr
Nitrogen, ammonia total [as N]monthly maximumreport only (mg/L)all year
Carbon, tot organic [TOC]valuereport only (mg/L)Apr
Flow, in conduit or thru treatment plantdaily maximum≤ 0 MGDall 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
Solids, total dissolveddaily maximum≤ 1500 mg/Lall year
Solids, total dissolvedquarterly maximumreport only (mg/L)Apr–Nov
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/OR0044709 · MCP: https://passage-data.com/mcp