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Cucharas Sanitation and Water District

Sewage treatment plant, Huerfano County, Colorado. NPDES permit CO0043745 expired Jul 31, 2019; its limits still apply. Last 12 months: over a limit 3 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (21 values), outfall 300 form I monthly (10 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
2 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
March 2026Solids, suspended percent removal, minimum50 %≥ 85 %233%
July 2026E. coli, 30-day geometric mean682 #/100mL≤ 192 #/100mL255%
August 2026E. coli, 30-day geometric mean497 #/100mL≤ 192 #/100mL159%

Limits in force (53)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademaximum weekly averagereport only (deg C)all year001
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001
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≤ 6.5 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 6.5 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 8 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 11 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 11 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 6.5 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 11 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 11 mg/LDec001
Nitrogen, ammonia total [as N]30-day average≤ 11 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 56 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 30 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 28 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 50 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 44 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 33 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 34 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 50 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 39 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 49 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 40 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 56 mg/LApr001
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≤ .175 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residual30-day average≤ .03 mg/Lall year001
Chlorine, total residualinstantaneous maximum≤ .047 mg/Lall year001
E. coli30-day geometric mean≤ 192 #/100mLall year001
E. colimaximum 7-day geometric mean≤ 2566 #/100mLall year001
BOD, 5-day, percent removalminimum≥ 85 %all year001
Solids, suspended percent removalminimum≥ 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.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/CO0043745 · MCP: https://passage-data.com/mcp