Passage Data · Check a report · Use it from your AI
Sewage treatment plant, major discharger, Pagosa Springs, Colorado. NPDES permit CO0031755 expired Jul 31, 2024; its limits still apply. Last 12 months: over a limit 9 times (last May 2026), 27 of 29 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Manganese, dissolved [as Mn], 30-day average | 56.8 ug/L | ≤ 50 ug/L | 14% |
| January 2026 | Manganese, dissolved [as Mn], 30-day average | 70.4 ug/L | ≤ 50 ug/L | 41% |
| January 2026 | Nitrogen, ammonia total [as N], 30-day average | 12.4 mg/L | ≤ 6.4 mg/L | 94% |
| January 2026 | Nitrogen, ammonia total [as N], daily maximum | 26.2 mg/L | ≤ 22 mg/L | 19% |
| February 2026 | Manganese, dissolved [as Mn], 30-day average | 62.8 ug/L | ≤ 50 ug/L | 26% |
| February 2026 | Nitrogen, ammonia total [as N], 30-day average | 10.9 mg/L | ≤ 6.1 mg/L | 79% |
| March 2026 | Manganese, dissolved [as Mn], 30-day average | 75.3 ug/L | ≤ 50 ug/L | 51% |
| April 2026 | Manganese, dissolved [as Mn], 30-day average | 81.1 ug/L | ≤ 50 ug/L | 62% |
| May 2026 | Manganese, dissolved [as Mn], 30-day average | 70.4 ug/L | ≤ 50 ug/L | 41% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.7 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.1 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.4 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.6 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.2 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.1 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.3 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.7 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.9 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.5 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 26 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 23 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 26 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 29 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 26 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 29 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 23 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 26 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 29 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 29 mg/L | Oct | 001 |
| Nitrogen, inorganic total | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, inorganic total | aggregate rolling median | report only (mg/L) | all year | 001 |
| Nitrogen, inorganic total | 95th percentile | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | aggregate rolling median | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | 95th percentile | report only (mg/L) | all year | 001 |
| Cyanide, weak acid, dissociable | daily maximum | report only (ug/L) | all year | 001 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 001 |
| Chloride [as Cl] | 30-day average | report only (mg/L) | all year | 001 |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Iron, total recoverable | 30-day average | ≤ 169 ug/L | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 001 |
| Iron, dissolved [as Fe] | 30-day average | report only (ug/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 001 |
| Manganese, dissolved [as Mn] | 30-day average | report only (ug/L) | all year | 001 |
| Manganese, dissolved [as Mn] | 30-day average | ≤ 50 ug/L | all year | 001 |
| Molybdenum, total [as Mo] | daily maximum | report only (ug/L) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | all year | 001 |
| Nickel, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Nickel, total recoverable | rolling average | report only (ug/L) | all year | 001 |
| Silver, total [as Ag] | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, total recoverable | rolling average | report only (ug/L) | all year | 001 |
| Lead, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Lead, total recoverable | rolling average | report only (ug/L) | all year | 001 |
| Molybdenum, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Molybdenum, total recoverable | rolling average | report only (ug/L) | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | 30-day average | report only (ug/L) | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | all year | 001 |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, potentially dissolved | rolling average | report only (ug/L) | all year | 001 |
| Silver, potentially dissolved | 30-day average | report only (ug/L) | all year | 001 |
| Silver, potentially dissolved | daily maximum | report only (ug/L) | all year | 001 |
| Silver, potentially dissolved | rolling average | report only (ug/L) | all year | 001 |
| Copper, potentially dissolved | 30-day average | ≤ 26 ug/L | all year | 001 |
| Copper, potentially dissolved | daily maximum | ≤ 44 ug/L | all year | 001 |
| Arsenic, potentially dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Cadmium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, trivalent, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Lead, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Lead, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Lead, potentially dissolvd | 30-day average | ≤ 4.6 ug/L | all year | 001 |
| Lead, potentially dissolvd | daily maximum | ≤ 248 ug/L | all year | 001 |
| Manganese, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Manganese, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Manganese, potentially dissolvd | rolling average | report only (ug/L) | all year | 001 |
| Nickel, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Nickel, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Nickel, potentially dissolvd | rolling average | report only (ug/L) | all year | 001 |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Selenium, potentially dissolvd | 30-day average | ≤ 2.1 ug/L | all year | 001 |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Selenium, potentially dissolvd | daily maximum | ≤ 18 ug/L | all year | 001 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 001 |
| Total phenols | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, trivalent total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, trivalent total recoverable | rolling average | report only (ug/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 3.7 MGD | Feb | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 3.9 MGD | Sep | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 3.9 MGD | May | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 3.9 MGD | Nov | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 3.7 MGD | Jan | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 3.9 MGD | Oct | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 3.9 MGD | Apr | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 3.9 MGD | Jul | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 3.9 MGD | Dec | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 3.9 MGD | Aug | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 3.7 MGD | Mar | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 3.9 MGD | Jun | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Feb | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Sep | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | May | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Nov | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Jan | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Oct | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Apr | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Jul | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Dec | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Aug | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Mar | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Jun | 001 |
| Chlorine, total residual | 30-day average | ≤ .011 mg/L | all year | 001 |
| Chlorine, total residual | instantaneous maximum | ≤ .019 mg/L | all year | 001 |
| Mercury, total low level | 30-day average | ≤ .01 ug/L | all year | 001 |
| Acrylamide | 30-day average | ≤ .022 ug/L | all year | 001 |
| Acrylamide | rolling average | ≤ .0033 ug/L | all year | 001 |
| Acrylamide | rolling average | report only (ug/L) | all year | 001 |
| E. coli | 30-day geometric mean | ≤ 205 #/100mL | all year | 001 |
| E. coli | maximum 7-day geometric mean | ≤ 410 #/100mL | all year | 001 |
| Sulfide-hydrogen sulfide [undissociated] | 30-day average | report only (mg/L) | all year | 001 |
| Nonylphenol | 30-day average | ≤ 5 ug/L | all year | 001 |
| Nonylphenol | 30-day average | report only (ug/L) | all year | 001 |
| Nonylphenol | daily maximum | ≤ 28 ug/L | all year | 001 |
| Nonylphenol | daily maximum | report only (ug/L) | all year | 001 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Sulfate | 30-day average | report only (mg/L) | all year | 001 |
| Oil and grease visual | instantaneous maximum | report only (abst=0;prst=1) | all year | 001 |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | single sample | report only (tox chronic) | all year | 001 |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum value | report only (tox chronic) | all year | 001 |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum value | ≥ 100 tox chronic | all year | 001 |
| Static Renewal 7 Day Chronic Pimephales promelas | single sample | report only (tox chronic) | all year | 001 |
| Static Renewal 7 Day Chronic Pimephales promelas | minimum value | report only (tox chronic) | all year | 001 |
| Static Renewal 7 Day Chronic Pimephales promelas | minimum value | ≥ 100 tox chronic | all year | 001 |
| Plant capacity fact. percent of capacity | 30-day average | report only (%) | all year | 300 |
| Plant capacity fact. percent of capacity | 30-day average | report only (%) | all year | 300 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 300 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 300 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (lb/d) | all year | 300 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year | 300 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 300 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 300 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 300 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 300 |
Cited limits by parameter: Colorado's rules and the federal ones.
· Save this facility as a site · Superfund sites nearby · Your permits on one board
On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/CO0031755 · MCP: https://passage-data.com/mcp