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Sundown Sanitary Sewer District

Dwelling Operators, Except Apartments, Astoria, Oregon. NPDES permit OR0027219, in force until May 31, 2030. 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 (4 values), form RW monthly (6 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 36 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. centigrademonthly maximumreport only (deg C)all year
Temperature, water deg. centigrademaximum 7-day averagereport only (deg C)all year
Oxygen, dissolved [DO]quarterly minimumreport only (mg/L)all year
Oxygen, dissolved [DO]quarterly minimumreport only (mg/L)all year
Oxygen, dissolved percent saturationquarterly minimumreport only (%)all year
Oxygen, dissolved percent saturationquarterly minimumreport only (%)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 1.8 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 1.8 lb/dMay–Oct
BOD, 5-day, 20 deg. Cdaily maximum≤ 3.6 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 3.6 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)May–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/LMay–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 2.7 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 2.7 lb/dMay–Oct
pHdaily minimum≥ 6 SU (alert, not enforceable)all year
pHdaily maximum≤ 9 SU (alert, not enforceable)all 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]monthly 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≤ 5.5 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 3.7 lb/dMay–Oct
Solids, total suspendeddaily maximum≤ 11 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendeddaily maximum≤ 7.4 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≤ 8.3 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 5.6 lb/dMay–Oct
Salinity [PSU]quarterly maximumreport only (PSU)all year
Salinity [PSU]monthly maximumreport only (PSU)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.

Same industry: the 4 Real Estate permits in Oregon.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OR0027219 · MCP: https://passage-data.com/mcp