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Sandy, City of

Sewage treatment plant, Boring, Oregon. NPDES permit OR0026573, in force until Apr 30, 2031. Last 12 months: over a limit 2 times (last November 2025), 2 required values missing, 5 of 20 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (1 value), outfall 001 form G monthly (2 values), outfall 003 form A monthly (1 value)
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 6 required values missing, 1 of 13 reports late

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

Period endingParameterReportedLimitOver by
November 2025E. coli, daily maximum1553.1 #/100mL≤ 406 #/100mL283%
November 2025E. coli, monthly geometric mean454.5 #/100mL≤ 126 #/100mL261%

Limits in force (66)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademonthly averagereport only (deg C)Jan, Feb, Mar, Apr, Nov, Dec001
Temperature, water deg. centigradedaily maximumreport only (deg C)Jan, Feb, Mar, Apr, Nov, Dec001
Temperature, water deg. centigrademonthly maximumreport only (deg C)Apr, Nov001
Temperature, water deg. centigrademonthly maximumreport only (deg C)Jan, Feb, Mar, Dec001
Temperature, water deg. centigrademaximum 7-day averagereport only (deg C)Jan, Feb, Mar, Apr, Nov, Dec001
Flow ratemonthly minimumreport only (cfs)Jan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 125 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cdaily maximum≤ 250 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 187 lb/dJan, Feb, Mar, Apr, Nov, Dec001
pHdaily minimum≥ 6 SUJan, Feb, Mar, Apr, Nov, Dec001
pHdaily maximum≤ 9 SUJan, Feb, Mar, Apr, Nov, Dec001
pHmonthly minimumreport only (SU)Jan, Feb, Mar, Apr, Nov, Dec001
pHmonthly maximumreport only (SU)Jan, Feb, Mar, Apr, Nov, Dec001
pHmonthly maximumreport only (SU)Jan, Feb, Mar, Apr, Nov, Dec001
Alkalinity, total [as CaCO3]monthly maximumreport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedmonthly average≤ 10 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedmonthly average≤ 125 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendeddaily maximum≤ 250 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedmonthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedweekly average≤ 15 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedweekly average≤ 187 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 3.7 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 10.9 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Jan, Feb, Mar, Apr, Nov, Dec001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)Jan, Feb, Mar, Apr, Nov, Dec001
Flow, in conduit or thru treatment plantdaily maximum≤ 0 gal/dMay–Oct001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
E. colimonthly geometric mean≤ 126 #/100mLJan, Feb, Mar, Apr, Nov, Dec001
E. colidaily maximum≤ 406 #/100mLJan, Feb, Mar, Apr, Nov, Dec001
E. colimonthly geometric mean≤ 126 #/100mLJan, Feb, Mar, Apr, Nov, Dec001
E. colidaily maximumreport only (#/100mL)Jan, Feb, Mar, Apr, Nov, Dec001
Dilution factordaily minimum≥ 10 RatioJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %Jan, Feb, Mar, Apr, Nov, Dec001
Solids, suspended percent removalmonthly average minimum≥ 85 %Jan, Feb, Mar, Apr, Nov, Dec001
Temperature, water deg. centigrademonthly averagereport only (deg C)Jan, Feb, Mar, Apr, Nov, Dec003
Temperature, water deg. centigradedaily maximumreport only (deg C)Jan, Feb, Mar, Apr, Nov, Dec003
Temperature, water deg. centigrademaximum 7-day averagereport only (deg C)Jan, Feb, Mar, Apr, Nov, Dec003
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/LJan, Feb, Mar, Apr, Nov, Dec003
BOD, 5-day, 20 deg. Cmonthly average≤ 125 lb/dJan, Feb, Mar, Apr, Nov, Dec003
BOD, 5-day, 20 deg. Cdaily maximum≤ 250 lb/dJan, Feb, Mar, Apr, Nov, Dec003
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/LJan, Feb, Mar, Apr, Nov, Dec003
BOD, 5-day, 20 deg. Cweekly average≤ 187 lb/dJan, Feb, Mar, Apr, Nov, Dec003
pHdaily minimum≥ 6 SUJan, Feb, Mar, Apr, Nov, Dec003
pHdaily maximum≤ 9 SUJan, Feb, Mar, Apr, Nov, Dec003
Solids, total suspendedmonthly average≤ 10 mg/LJan, Feb, Mar, Apr, Nov, Dec003
Solids, total suspendedmonthly average≤ 125 lb/dJan, Feb, Mar, Apr, Nov, Dec003
Solids, total suspendeddaily maximum≤ 250 lb/dJan, Feb, Mar, Apr, Nov, Dec003
Solids, total suspendedweekly average≤ 15 mg/LJan, Feb, Mar, Apr, Nov, Dec003
Solids, total suspendedweekly average≤ 187 lb/dJan, Feb, Mar, Apr, Nov, Dec003
Nitrogen, ammonia total [as N]monthly average≤ 3.7 mg/LJan, Feb, Mar, Apr, Nov, Dec003
Nitrogen, ammonia total [as N]daily maximum≤ 10.9 mg/LJan, Feb, Mar, Apr, Nov, Dec003
Flow, in conduit or thru treatment plantdaily maximum≤ 0 gal/dMay–Oct003
Flow, in conduit or thru treatment plantdaily maximum≤ 0 gal/dJan, Feb, Mar, Apr, Nov, Dec003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Jan, Feb, Mar, Apr, Nov, Dec003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)Jan, Feb, Mar, Apr, Nov, Dec003
E. colimonthly geometric mean≤ 126 #/100mLJan, Feb, Mar, Apr, Nov, Dec003
E. colidaily maximum≤ 406 #/100mLJan, Feb, Mar, Apr, Nov, Dec003
E. colimonthly geometric mean≤ 126 #/100mLJan, Feb, Mar, Apr, Nov, Dec003
E. colidaily maximumreport only (#/100mL)Jan, Feb, Mar, Apr, Nov, Dec003
Dilution factordaily minimum≥ 10 RatioJan, Feb, Mar, Apr, Nov, Dec003
BOD, 5-day, percent removalmonthly average minimum≥ 85 %Jan, Feb, Mar, Apr, Nov, Dec003
Solids, suspended percent removalmonthly average minimum≥ 85 %Jan, Feb, Mar, Apr, Nov, Dec003

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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