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Water Supply, Columbia, Missouri. NPDES permit MO0136034 expired Sep 30, 2019; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | daily maximum | report only (SU) | all year | 001 |
| pH | daily maximum | report only (SU) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/kg) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/kg) | all year | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/kg) | all year | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/kg) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/kg) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/kg) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/kg) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/kg) | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (mg/kg) | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (mg/kg) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/kg) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/kg) | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (mg/kg) | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (mg/kg) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/kg) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/kg) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/kg) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/kg) | all year | 001 |
| Molybdenum, total [as Mo] | daily maximum | report only (mg/kg) | all year | 001 |
| Molybdenum, total [as Mo] | daily maximum | report only (mg/kg) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/kg) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/kg) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/kg) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/kg) | all year | 001 |
| Aluminum, total [as Al] | daily maximum | report only (mg/kg) | all year | 001 |
| Aluminum, total [as Al] | daily maximum | report only (mg/kg) | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (mg/kg) | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (mg/kg) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (mg/kg) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (mg/kg) | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Solids, settleable | daily maximum | ≤ 1 mL/L | all year | 002 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 10 mg/L | all year | 002 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia 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 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 002 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 002 |
| Iron, total recoverable | daily maximum | ≤ 1639 ug/L | all year | 002 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Thallium, total recoverable | daily average | report only (ug/L) | all year | 002 |
| Beryllium, total recoverable [as Be] | daily maximum | report only (ug/L) | all year | 002 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Aluminum, total recoverable | daily maximum | ≤ 750 ug/L | all year | 002 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 002 |
| Rainfall | daily maximum | report only (in) | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ 17 ug/L | all year | 002 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Storm water flow | daily maximum | report only (MGD) | all year | 002 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 003 |
| pH | minimum | ≥ 6.5 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Solids, settleable | daily maximum | ≤ 1 mL/L | all year | 003 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 10 mg/L | all year | 003 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 003 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 003 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 003 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 003 |
| Iron, total recoverable | daily maximum | ≤ 1639 ug/L | all year | 003 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Thallium, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Beryllium, total recoverable [as Be] | daily maximum | report only (ug/L) | all year | 003 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Aluminum, total recoverable | daily maximum | ≤ 750 ug/L | all year | 003 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 003 |
| Rainfall | daily maximum | report only (in) | all year | 003 |
| Chlorine, total residual | daily maximum | ≤ 17 ug/L | all year | 003 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Storm water flow | daily maximum | report only (MGD) | all year | 003 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 004 |
| pH | minimum | ≥ 6.5 SU | all year | 004 |
| pH | maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 004 |
| Solids, settleable | daily maximum | ≤ 1 mL/L | all year | 004 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 10 mg/L | all year | 004 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 004 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 004 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 004 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 004 |
| Iron, total recoverable | daily maximum | ≤ 1639 ug/L | all year | 004 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Thallium, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Beryllium, total recoverable [as Be] | daily maximum | report only (ug/L) | all year | 004 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Aluminum, total recoverable | daily maximum | ≤ 750 ug/L | all year | 004 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 004 |
| Rainfall | daily maximum | report only (in) | all year | 004 |
| Chlorine, total residual | daily maximum | ≤ 17 ug/L | all year | 004 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Storm water flow | daily maximum | report only (MGD) | all year | 004 |
Cited limits by parameter: Missouri's rules and the federal ones.
Same industry: the 18 Water Supply permits in Missouri.
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Your permit document is the final word. As JSON: /api/v1/permits/MO0136034 · MCP: https://passage-data.com/mcp