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Federal facility (Sewerage Systems), Mesa Verde, Colorado. NPDES permit CO0034398 expired Jun 30, 2024; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | Apr–Sep | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | Apr–Sep | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | Apr–Sep | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | Apr–Sep | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | Apr–Sep | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | Apr–Sep | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | Apr–Sep | 001 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | Apr–Sep | 001 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.1 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.1 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.7 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.7 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.7 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.7 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.7 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.7 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.2 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.2 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.9 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.9 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.4 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.4 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.3 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.3 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.9 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.9 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.3 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.3 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.9 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.9 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.3 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.3 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.1 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.1 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.9 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.9 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.7 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.7 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.9 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.9 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.7 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.7 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11 mg/L | Oct | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Floating solids, waste or visible foam-visual | instantaneous maximum | report only (N=0;Y=1) | all year | 001 |
| Floating solids, waste or visible foam-visual | instantaneous maximum | report only (N=0;Y=1) | all year | 001 |
| Chlorine, total residual | 30-day average | ≤ .011 mg/L | all year | 001 |
| Chlorine, total residual | 30-day average | ≤ .011 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | all year | 001 |
| E. coli | 30-day average | ≤ 126 #/100mL | all year | 001 |
| E. coli | 30-day average | ≤ 126 #/100mL | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total dissolved | daily maximum | ≤ 400 mg/L | all year | 001 |
| Solids, total dissolved | daily maximum | ≤ 400 mg/L | all year | 001 |
| Flow | 30-day average | ≤ .085 MGD | all year | 001 |
| Flow | 30-day average | ≤ .085 MGD | all year | 001 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 001 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 002 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | Apr–Sep | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | Apr–Sep | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 002 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | Apr–Sep | 002 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | Apr–Sep | 002 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 002 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | Apr–Sep | 002 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | Apr–Sep | 002 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 002 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 002 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | Apr–Sep | 002 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | Apr–Sep | 002 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 002 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 002 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 002 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.1 mg/L | Jan | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.1 mg/L | Jan | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.7 mg/L | Nov | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.7 mg/L | Nov | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.7 mg/L | Dec | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.7 mg/L | Dec | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.7 mg/L | Feb | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.7 mg/L | Feb | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.2 mg/L | Mar | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.2 mg/L | Mar | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.9 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.9 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.4 mg/L | May | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.4 mg/L | May | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3 mg/L | Jun | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3 mg/L | Jun | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.3 mg/L | Jul | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.3 mg/L | Jul | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.9 mg/L | Aug | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.9 mg/L | Aug | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.3 mg/L | Sep | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.3 mg/L | Sep | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Oct | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13 mg/L | Jan | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13 mg/L | Jan | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11 mg/L | Nov | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11 mg/L | Nov | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.9 mg/L | Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.9 mg/L | Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11 mg/L | Feb | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11 mg/L | Feb | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.3 mg/L | Mar | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.3 mg/L | Mar | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.1 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.1 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.9 mg/L | May | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.9 mg/L | May | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | Jun | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | Jun | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.7 mg/L | Jul | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9.7 mg/L | Jul | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.9 mg/L | Aug | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.9 mg/L | Aug | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.7 mg/L | Sep | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.7 mg/L | Sep | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11 mg/L | Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11 mg/L | Oct | 002 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Floating solids, waste or visible foam-visual | instantaneous maximum | report only (N=0;Y=1) | all year | 002 |
| Floating solids, waste or visible foam-visual | instantaneous maximum | report only (N=0;Y=1) | all year | 002 |
| Chlorine, total residual | 30-day average | ≤ .011 mg/L | all year | 002 |
| Chlorine, total residual | 30-day average | ≤ .011 mg/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | all year | 002 |
| E. coli | 30-day average | ≤ 126 #/100mL | all year | 002 |
| E. coli | 30-day average | ≤ 126 #/100mL | all year | 002 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 002 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 002 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 002 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 002 |
| Solids, total dissolved | daily maximum | ≤ 400 mg/L | all year | 002 |
| Solids, total dissolved | daily maximum | ≤ 400 mg/L | all year | 002 |
| Flow | 30-day average | ≤ .05 MGD | all year | 002 |
| Flow | 30-day average | ≤ .05 MGD | all year | 002 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 002 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 002 |
Cited limits by parameter: Colorado's rules and the federal ones.
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