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Forest Park MHP, LLC

Sewerage Systems, Oregon City, Oregon. NPDES permit OR0031267, in force until Jun 30, 2029. Last 12 months: over a limit 10 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (26 values), form G monthly (4 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
25 values over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
January 2026E. coli, daily maximum610 #/100mL≤ 406 #/100mL50%
January 2026E. coli, monthly geometric mean292 #/100mL≤ 126 #/100mL132%
January 2026E. coli, monthly geometric mean292 #/100mL≤ 126 #/100mL132%
February 2026BOD, 5-day, 20 deg. C, monthly average1.25 lb/d≤ .8 lb/d56%
February 2026E. coli, daily maximum2400 #/100mL≤ 406 #/100mL491%
February 2026E. coli, monthly geometric mean1021 #/100mL≤ 126 #/100mL710%
February 2026E. coli, monthly geometric mean1021 #/100mL≤ 126 #/100mL710%
February 2026Solids, suspended percent removal, monthly average minimum69 %≥ 70 %3%
May 2026BOD, 5-day, 20 deg. C, monthly average.46 lb/d≤ .4 lb/d15%
June 2026E. coli, daily maximum2400 #/100mL≤ 406 #/100mL491%

Limits in force (42)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradedaily 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≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ .4 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ .8 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ .8 lb/dMay–Oct
BOD, 5-day, 20 deg. Cdaily maximum≤ 1.7 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)May–Oct
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/LMay–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ .6 lb/dMay–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 1.3 lb/dJan, Feb, Mar, Apr, Nov, Dec
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
Alkalinity, total [as CaCO3]quarterly maximumreport only (mg/L)all year
Solids, total suspendedmonthly average≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 10 mg/LMay–Oct
Solids, total suspendedmonthly average≤ .8 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ .4 lb/dMay–Oct
Solids, total suspendeddaily maximum≤ 1.7 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendeddaily maximum≤ .8 lb/dMay–Oct
Solids, total suspendedmonthly averagereport only (mg/L)May–Oct
Solids, total suspendedmonthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 15 mg/LMay–Oct
Solids, total suspendedweekly average≤ 1.3 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ .6 lb/dMay–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
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 70 %all year
pH range excursions, > 60 minutestotal≤ 0 occur/moall year
pH range excursions, monthly total accumtotal≤ 446 minall year

How strict are these limits?

Cited limits by parameter: Oregon's rules and the federal ones.

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Your permit document is the final word. As JSON: /api/v1/permits/OR0031267 · MCP: https://passage-data.com/mcp