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Refuse Systems, Maryland Heights, Missouri. NPDES permit MO0097543, in force until Nov 30, 2026. Last 12 months: over a limit 14 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| December 2025 | 011 | Selenium, total recoverable, daily maximum | 15.3 | ≤ 8 ug/L | 91% |
| December 2025 | 011 | Solids, total suspended, daily maximum | 93 | ≤ 80 mg/L | 16% |
| December 2025 | 015 | Selenium, total recoverable, daily maximum | 8.8 | ≤ 8 ug/L | 10% |
| March 2026 | 011 | Aluminum, total recoverable, daily maximum | 2530 | ≤ 750 ug/L | 237% |
| March 2026 | 011 | Selenium, total recoverable, daily maximum | 13.5 | ≤ 8 ug/L | 69% |
| March 2026 | 011 | Solids, total suspended, daily maximum | 90 | ≤ 80 mg/L | 13% |
| March 2026 | 015 | Aluminum, total recoverable, daily maximum | 797 | ≤ 750 ug/L | 6% |
| March 2026 | 015 | Cadmium, total recoverable, daily maximum | 5.14 | ≤ 1.8 ug/L | 186% |
| March 2026 | 015 | Selenium, total recoverable, daily maximum | 8.37 | ≤ 8 ug/L | 5% |
| June 2026 | 011 | Selenium, total recoverable, daily maximum | 10.1 | ≤ 8 ug/L | 26% |
| June 2026 | 015 | Aluminum, total recoverable, daily maximum | 1640 | ≤ 750 ug/L | 119% |
| June 2026 | 015 | Cadmium, total recoverable, daily maximum | 2.16 | ≤ 1.8 ug/L | 20% |
| June 2026 | 015 | Iron, total recoverable, daily maximum | 2010 | ≤ 1801 ug/L | 12% |
| June 2026 | 020 | Selenium, total recoverable, daily maximum | 24.8 | ≤ 8 ug/L | 210% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Sulfate [as S] | daily maximum | report only (mg/L) | all year | 011 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 120 mg/L | all year | 011 |
| pH | minimum | ≥ 6.5 SU | all year | 011 |
| pH | maximum | ≤ 9 SU | all year | 011 |
| Solids, total suspended | daily maximum | ≤ 80 mg/L | all year | 011 |
| Solids, settleable | daily maximum | ≤ 1.5 mL/L | all year | 011 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 15 mg/L | all year | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.1 mg/L | Jan–Mar | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.4 mg/L | Oct–Dec | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.1 mg/L | Apr–Jun | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.4 mg/L | Jul–Sep | 011 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 011 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 011 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 011 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 011 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Iron, total recoverable | daily maximum | ≤ 4000 ug/L | all year | 011 |
| Selenium, total recoverable | daily maximum | ≤ 8 ug/L | all year | 011 |
| Thallium, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Beryllium, total recoverable [as Be] | daily maximum | report only (ug/L) | all year | 011 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Zinc, total recoverable | daily maximum | ≤ 223 ug/L | all year | 011 |
| Aluminum, total recoverable | daily maximum | ≤ 750 ug/L | all year | 011 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | ≤ 16 ug/L | all year | 011 |
| Antimony, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Chromium, trivalent total recoverable | daily maximum | ≤ 182 ug/L | all year | 011 |
| Benzene | daily maximum | report only (ug/L) | all year | 011 |
| Chloride | daily maximum | ≤ 860 mg/L | all year | 011 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Storm water flow | daily maximum | report only (MGD) | all year | 011 |
| Chlorides + Sulfates | daily maximum | ≤ 1000 mg/L | all year | 011 |
| Sulfate [as S] | daily maximum | report only (mg/L) | all year | 015 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 120 mg/L | all year | 015 |
| pH | minimum | ≥ 6.5 SU | all year | 015 |
| pH | maximum | ≤ 9 SU | all year | 015 |
| Solids, total suspended | daily maximum | ≤ 80 mg/L | all year | 015 |
| Solids, settleable | daily maximum | ≤ 1.5 mL/L | all year | 015 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 15 mg/L | all year | 015 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.4 mg/L | Apr, Jul, Aug, Sep, Oct, Nov, Dec | 015 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.1 mg/L | Jan, Feb, May | 015 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.1 mg/L | Mar, Jun, Dec | 015 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 015 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 015 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 015 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 015 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 015 |
| Iron, total recoverable | daily maximum | ≤ 1801 ug/L | all year | 015 |
| Selenium, total recoverable | daily maximum | ≤ 8 ug/L | all year | 015 |
| Thallium, total recoverable | daily maximum | report only (ug/L) | all year | 015 |
| Beryllium, total recoverable [as Be] | daily maximum | report only (ug/L) | all year | 015 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 015 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 015 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 015 |
| Aluminum, total recoverable | daily maximum | ≤ 750 ug/L | all year | 015 |
| Cadmium, total recoverable | daily maximum | ≤ 1.8 ug/L | all year | 015 |
| Lead, total recoverable | daily maximum | ≤ 12.9 ug/L | all year | 015 |
| Copper, total recoverable | daily maximum | ≤ 25 ug/L | all year | 015 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 015 |
| Antimony, total recoverable | daily maximum | report only (ug/L) | all year | 015 |
| Chromium, trivalent total recoverable | daily maximum | report only (ug/L) | all year | 015 |
| Benzene | daily maximum | report only (ug/L) | all year | 015 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 015 |
| Storm water flow | daily maximum | report only (MGD) | all year | 015 |
| Chlorides + Sulfates | daily maximum | report only (mg/L) | all year | 015 |
| Sulfate [as S] | daily maximum | report only (mg/L) | all year | 020 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 120 mg/L | all year | 020 |
| pH | minimum | ≥ 6.5 SU | all year | 020 |
| pH | maximum | ≤ 9 SU | all year | 020 |
| Solids, total suspended | daily maximum | ≤ 80 mg/L | all year | 020 |
| Solids, settleable | daily maximum | ≤ 1.5 mg/L | all year | 020 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 15 mg/L | all year | 020 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.1 mg/L | Apr–Jun | 020 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.4 mg/L | Jul–Dec | 020 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.1 mg/L | Jan–Mar | 020 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 020 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 020 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 020 |
| Fluoride | daily maximum | report only (mg/L) | all year | 020 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 020 |
| Iron, total recoverable | daily maximum | ≤ 4000 ug/L | all year | 020 |
| Selenium, total recoverable | daily maximum | ≤ 8 ug/L | all year | 020 |
| Thallium, total recoverable | daily maximum | report only (ug/L) | all year | 020 |
| Beryllium, total recoverable [as Be] | daily maximum | report only (ug/L) | all year | 020 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 020 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 020 |
| Zinc, total recoverable | daily maximum | ≤ 223 ug/L | all year | 020 |
| Aluminum, total recoverable | daily maximum | ≤ 750 ug/L | all year | 020 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 020 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 020 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 020 |
| Antimony, total recoverable | daily maximum | report only (ug/L) | all year | 020 |
| Chromium, trivalent total recoverable | daily maximum | ≤ 182 ug/L | all year | 020 |
| Benzene | daily maximum | report only (ug/L) | all year | 020 |
| Chloride | daily maximum | ≤ 860 mg/L | all year | 020 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 020 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 020 |
| Chromium, hexavalent tot recoverable | daily maximum | ≤ 16 ug/L | all year | 020 |
| Chlorides + Sulfates | daily maximum | ≤ 1000 mg/L | all year | 020 |
Cited limits by parameter: Missouri's rules and the federal ones.
Same industry: the 40 Refuse Systems permits in Missouri.
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