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Mountain Valley Estates LLC

Sewerage Systems, Leadville, Colorado. NPDES permit CO0049021 expired Jul 31, 2023; its limits still apply. Last 12 months: over a limit 54 times (last August 2026), 4 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (23 values), outfall 300 form I monthly (10 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
53 values over a limit, 99 required values missing, 6 of 24 reports late

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

All 54 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, 30-day average59 mg/L≤ 30 mg/L97%
October 2025BOD, 5-day, 20 deg. C, maximum 7-day average59 mg/L≤ 45 mg/L31%
October 2025E. coli, 30-day geometric mean2420 #/100mL≤ 2000 #/100mL21%
October 2025Solids, total suspended, 30-day average45 mg/L≤ 30 mg/L50%
November 2025E. coli, 30-day geometric mean2420 #/100mL≤ 2000 #/100mL21%
November 2025Solids, total suspended, 30-day average35 mg/L≤ 30 mg/L17%
November 2025Zinc, potentially dissolved, 30-day average64 ug/L≤ 57 ug/L12%
December 2025E. coli, 30-day geometric mean2420 #/100mL≤ 2000 #/100mL21%
December 2025Solids, suspended percent removal, monthly average minimum74 %≥ 85 %73%
December 2025Solids, total suspended, 30-day average31 mg/L≤ 30 mg/L3%
January 2026BOD, 5-day, percent removal, monthly average minimum76 %≥ 85 %60%
January 2026Solids, suspended percent removal, monthly average minimum72 %≥ 85 %87%
February 2026BOD, 5-day, 20 deg. C, 30-day average36 mg/L≤ 30 mg/L20%
February 2026Solids, suspended percent removal, monthly average minimum-6 %≥ 85 %607%
February 2026Solids, total suspended, 30-day average38 mg/L≤ 30 mg/L27%
March 2026Arsenic, total recoverable, 30-day average.7 ug/L≤ .02 ug/L3400%
March 2026BOD, 5-day, 20 deg. C, 30-day average38 mg/L≤ 30 mg/L27%
March 2026BOD, 5-day, percent removal, monthly average minimum78 %≥ 85 %47%
March 2026E. coli, 30-day geometric mean> 2419.6 #/100mL≤ 2000 #/100mL—
March 2026E. coli, maximum 7-day geometric mean> 2419.6 #/100mL≤ 4000 #/100mL—
March 2026Nitrogen, ammonia total [as N], 30-day average27.2 %≤ 65 mg/L—
March 2026Nitrogen, ammonia total [as N], daily maximum27.2 %≤ 65 mg/L—
March 2026Solids, suspended percent removal, monthly average minimum80 %≥ 85 %33%
April 2026Arsenic, total recoverable, 30-day average< .06 ug/L≤ .02 ug/L200%
May 2026Arsenic, total recoverable, 30-day average.8 ug/L≤ .02 ug/L3900%
May 2026E. coli, 30-day geometric mean173290 #/100mL≤ 2000 #/100mL8565%
May 2026E. coli, maximum 7-day geometric mean173290 #/100mL≤ 4000 #/100mL4232%
May 2026Solids, total suspended, 30-day average31 mg/L≤ 30 mg/L3%
June 2026Arsenic, total recoverable, 30-day average< .06 ug/L≤ .02 ug/L200%
June 2026BOD, 5-day, 20 deg. C, 30-day average35 mg/L≤ 30 mg/L17%
June 2026BOD, 5-day, percent removal, monthly average minimum49 %≥ 85 %240%
June 2026E. coli, 30-day geometric mean11624 #/100mL≤ 2000 #/100mL481%
June 2026E. coli, maximum 7-day geometric mean11624 #/100mL≤ 4000 #/100mL191%
June 2026Solids, total suspended, 30-day average56 mg/L≤ 30 mg/L87%
June 2026Solids, total suspended, maximum 7-day average56 mg/L≤ 45 mg/L24%
July 2026Arsenic, total recoverable, 30-day average.7 ug/L≤ .02 ug/L3400%
July 2026BOD, 5-day, 20 deg. C, 30-day average63 mg/L≤ 30 mg/L110%
July 2026BOD, 5-day, 20 deg. C, maximum 7-day average63 mg/L≤ 45 mg/L40%
July 2026BOD, 5-day, percent removal, monthly average minimum72 %≥ 85 %87%
July 2026E. coli, 30-day geometric mean> 241960 #/100mL≤ 2000 #/100mL—
July 2026E. coli, maximum 7-day geometric mean> 241960 #/100mL≤ 4000 #/100mL—
July 2026Solids, suspended percent removal, monthly average minimum34 %≥ 85 %340%
July 2026Solids, total suspended, 30-day average63 mg/L≤ 30 mg/L110%
July 2026Solids, total suspended, maximum 7-day average63 mg/L≤ 45 mg/L40%
August 2026Arsenic, total recoverable, 30-day average.7 ug/L≤ .02 ug/L3400%
August 2026BOD, 5-day, 20 deg. C, 30-day average76 mg/L≤ 30 mg/L153%
August 2026BOD, 5-day, 20 deg. C, maximum 7-day average76 mg/L≤ 45 mg/L69%
August 2026E. coli, 30-day geometric mean> 24196 #/100mL≤ 2000 #/100mL—
August 2026E. coli, maximum 7-day geometric mean> 24196 #/100mL≤ 4000 #/100mL—
August 2026Solids, suspended percent removal, monthly average minimum84 %≥ 85 %7%
August 2026Solids, total suspended, 30-day average100 mg/L≤ 30 mg/L233%
August 2026Solids, total suspended, maximum 7-day average100 mg/L≤ 45 mg/L122%
August 2026Zinc, potentially dissolved, 30-day average91 ug/L≤ 57 ug/L60%
August 2026Zinc, potentially dissolved, daily maximum91 ug/L≤ 75 ug/L21%

Limits in force (34)

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≤ 65 mg/Lall year001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/Lall year001
Nitrogen, inorganic totaldaily maximum≤ 2250 mg/Lall year001
Arsenic, total recoverable30-day average≤ 3 ug/Lall year001
Arsenic, total recoverable30-day average≤ .02 ug/Lall year001
Zinc, potentially dissolved30-day average≤ 57 ug/Lall year001
Zinc, potentially dissolveddaily maximum≤ 75 ug/Lall year001
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year001
Flow, in conduit or thru treatment plant30-day average≤ .02 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualinstantaneous maximum≤ .5 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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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/CO0049021 · MCP: https://passage-data.com/mcp