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RE1 Valley School District

Sewerage Systems, Iliff, Colorado. NPDES permit CO0049042 expired Nov 30, 2024; its limits still apply. Last 12 months: over a limit 28 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (20 values), outfall 300 form I monthly (10 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
7 values over a limit, 0 required values missing, 0 of 24 reports late

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

All 28 values over a limit
Period endingParameterReportedLimitOver by
October 2025Phosphorus, total [as P], 30-day average9.53 mg/L≤ 1.6 mg/L496%
October 2025Solids, suspended percent removal, monthly average minimum60 %≥ 85 %167%
October 2025Solids, total suspended, 30-day average138 mg/L≤ 30 mg/L360%
October 2025Solids, total suspended, maximum 7-day average138 mg/L≤ 45 mg/L207%
October 2025pH, maximum10.2 SU≤ 9 SU—
November 2025Phosphorus, total [as P], 30-day average9.43 mg/L≤ 1.6 mg/L489%
November 2025Solids, total suspended, 30-day average35 mg/L≤ 30 mg/L17%
November 2025pH, maximum10.3 SU≤ 9 SU—
December 2025Phosphorus, total [as P], 30-day average8.9 mg/L≤ 1.6 mg/L456%
December 2025Solids, suspended percent removal, monthly average minimum50 %≥ 85 %233%
December 2025Solids, total suspended, 30-day average51 mg/L≤ 30 mg/L70%
December 2025Solids, total suspended, maximum 7-day average51 mg/L≤ 45 mg/L13%
December 2025pH, maximum10.4 SU≤ 9 SU—
January 2026Phosphorus, total [as P], 30-day average10.9 mg/L≤ 1.6 mg/L581%
January 2026Solids, suspended percent removal, monthly average minimum77 %≥ 85 %53%
January 2026Solids, total suspended, 30-day average65 mg/L≤ 30 mg/L117%
January 2026Solids, total suspended, maximum 7-day average65 mg/L≤ 45 mg/L44%
January 2026pH, maximum10.5 SU≤ 9 SU—
February 2026Phosphorus, total [as P], 30-day average5.04 mg/L≤ 1.6 mg/L215%
February 2026pH, maximum10.4 SU≤ 9 SU—
March 2026BOD, 5-day, 20 deg. C, 30-day average65 mg/L≤ 30 mg/L117%
March 2026BOD, 5-day, 20 deg. C, maximum 7-day average65 mg/L≤ 45 mg/L44%
March 2026BOD, 5-day, percent removal, monthly average minimum81 %≥ 85 %27%
March 2026Phosphorus, total [as P], 30-day average11.8 mg/L≤ 1.6 mg/L638%
March 2026Solids, suspended percent removal, monthly average minimum0 %≥ 85 %567%
March 2026Solids, total suspended, 30-day average180 mg/L≤ 30 mg/L500%
March 2026Solids, total suspended, maximum 7-day average180 mg/L≤ 45 mg/L300%
March 2026pH, maximum10.4 SU≤ 9 SU—

Limits in force (53)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. C30-day average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum 7-day average≤ 45 mg/Lall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspended30-day average≤ 30 mg/Lall year001
Solids, total suspendedmaximum 7-day average≤ 45 mg/Lall year001
Nitrogen, ammonia total [as N]30-day average≤ 51 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 56 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 29 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 35 mg/LApr001
Nitrogen, ammonia total [as N]30-day average≤ 34 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 26 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 20 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 18 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 24 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 40 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 50 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 39 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LDec001
Nitrogen, inorganic totaldaily maximum≤ 93 mg/Lall year001
Phosphorus, total [as P]30-day averagereport only (mg/L)all year001
Phosphorus, total [as P]30-day average≤ 1.6 mg/Lall year001
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year001
Flow, in conduit or thru treatment plant30-day average≤ .017 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residual30-day average≤ .022 mg/Lall year001
Chlorine, total residualinstantaneous maximum≤ .38 mg/Lall year001
E. coli30-day geometric mean≤ 2000 #/100mLall year001
E. colimaximum 7-day geometric mean≤ 4000 #/100mLall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=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
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year300
BOD, 5-day, 20 deg. Cmaximum 7-day averagereport only (mg/L)all year300
BOD, 5-day, 20 deg. C30-day averagereport only (lb/d)all year300
BOD, 5-day, 20 deg. Cmaximum 7-day averagereport only (lb/d)all year300
Solids, total suspended30-day averagereport only (mg/L)all year300
Solids, total suspendedmaximum 7-day averagereport only (mg/L)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

How strict are these limits?

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

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Your permit document is the final word. As JSON: /api/v1/permits/CO0049042 · MCP: https://passage-data.com/mcp