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Forest Lake Metro Dist

Sewerage Systems, La Plata County, Colorado. NPDES permit CO0048160 expired May 31, 2018; its limits still apply. Last 12 months: over a limit 2 times (last March 2026), 1 of 17 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (11 values), outfall 001 form Q quarterly (10 values), outfall 300 form I quarterly (6 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 0 of 20 reports late

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

Period endingParameterReportedLimitOver by
February 2026Nitrogen, ammonia total [as N], rolling average25.76 mg/L≤ 6.1 mg/L322%
March 2026Nitrogen, ammonia total [as N], rolling average21.66 mg/L≤ 7.5 mg/L189%

Limits in force (60)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspended30-day average≤ 75 mg/Lall year001
Solids, total suspendedmaximum 7-day average≤ 110 mg/Lall year001
Nitrogen, ammonia total [as N]30-day average≤ 40 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 28 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 35 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 42 mg/LApr001
Nitrogen, ammonia total [as N]30-day average≤ 50 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 50 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 50 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 50 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 50 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 48 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 34 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 37 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 50 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 44 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 50 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 50 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 50 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 50 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 50 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 50 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 50 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 50 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 50 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 50 mg/LDec001
Nitrogen, ammonia total [as N]rolling average≤ 8.8 mg/LJan001
Nitrogen, ammonia total [as N]rolling average≤ 6.1 mg/LFeb001
Nitrogen, ammonia total [as N]rolling average≤ 7.5 mg/LMar001
Nitrogen, ammonia total [as N]rolling average≤ 7.7 mg/LApr001
Nitrogen, ammonia total [as N]rolling average≤ 13 mg/LMay001
Nitrogen, ammonia total [as N]rolling average≤ 42 mg/LJun001
Nitrogen, ammonia total [as N]rolling average≤ 40 mg/LJul001
Nitrogen, ammonia total [as N]rolling average≤ 46 mg/LAug001
Nitrogen, ammonia total [as N]rolling average≤ 35 mg/LSep001
Nitrogen, ammonia total [as N]rolling average≤ 8.8 mg/LOct001
Nitrogen, ammonia total [as N]rolling average≤ 5.8 mg/LNov001
Nitrogen, ammonia total [as N]rolling average≤ 7.3 mg/LDec001
Nitrogen, inorganic totaldaily maximumreport only (mg/L)all year001
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year001
Flow, in conduit or thru treatment plant30-day average≤ .18 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residual30-day average≤ .17 mg/Lall year001
Chlorine, total residualinstantaneous maximum≤ .22 mg/Lall year001
E. coli30-day geometric mean≤ 2277 #/100mLall year001
E. colimaximum 7-day geometric mean≤ 4554 #/100mLall year001
E. colirolling average≤ 667 #/100mLall year001
Solids, total dissolved30-day averagereport only (mg/L)all year001
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]maximum 7-day average≤ 40 mg/Lall year001
BOD, carb-5 day, 20 deg C, percent removalminimum≥ 85 %all year001
Oil and grease visualinstantaneous maximumreport only (N=0;Y=1)all year001
Plant capacity fact. percent of capacity30-day averagereport only (%)all year300
Plant capacity fact. percent of capacity30-day averagereport only (%)all year300
Flow, in conduit or thru treatment plant30-day averagereport only (MGD)all year300
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year300
BOD, carbonaceous [5 day, 20 C]30-day averagereport only (mg/L)all year300
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all year300

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/CO0048160 · MCP: https://passage-data.com/mcp