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Cement, Hydraulic, Tulsa, Oklahoma. NPDES permit OK0040789, in force until Jan 31, 2028. Last 12 months: over a limit once (last April 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| April 2026 | Chloride [as Cl], monthly average | 500 mg/L | ≤ 449 mg/L | 11% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 001 |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | monthly average | ≤ 449 mg/L | all year | 001 |
| Sulfate, total [as SO4] | daily maximum | ≤ 534 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Solids, total dissolved | monthly average | ≤ 1258 mg/L | all year | 001 |
| Solids, total dissolved | daily maximum | ≤ 1494 mg/L | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 004 |
| pH | maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 004 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 004 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 004 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 004 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 004 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 004 |
| pH | minimum | ≥ 6.5 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 005 |
| Chloride [as Cl] | monthly average | ≤ 449 mg/L | all year | 005 |
| Chloride [as Cl] | daily maximum | ≤ 534 mg/L | all year | 005 |
| Sulfate, total [as SO4] | monthly average | ≤ 350 mg/L | all year | 005 |
| Sulfate, total [as SO4] | daily maximum | ≤ 350 mg/L | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Solids, total dissolved | monthly average | ≤ 1004 mg/L | all year | 005 |
| Solids, total dissolved | daily maximum | ≤ 1051 mg/L | all year | 005 |
| pH | minimum | ≥ 6.5 SU | all year | 006 |
| pH | maximum | ≤ 9 SU | all year | 006 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 006 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 006 |
| Chloride [as Cl] | monthly average | ≤ 449 mg/L | all year | 006 |
| Chloride [as Cl] | daily maximum | ≤ 534 mg/L | all year | 006 |
| Sulfate, total [as SO4] | monthly average | ≤ 449 mg/L | all year | 006 |
| Sulfate, total [as SO4] | daily maximum | ≤ 534 mg/L | all year | 006 |
| Selenium, total [as Se] | monthly average | ≤ 4.74 ug/L | all year | 006 |
| Selenium, total [as Se] | daily maximum | ≤ 8.21 ug/L | all year | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| Solids, total dissolved | monthly average | ≤ 1258 mg/L | all year | 006 |
| Solids, total dissolved | daily maximum | ≤ 1494 mg/L | all year | 006 |
Cited limits by parameter: Oklahoma's rules and the federal ones.
Same industry: the 7 Stone, Clay, Glass and Concrete Products permits in Oklahoma.
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Your permit document is the final word. As JSON: /api/v1/permits/OK0040789 · MCP: https://passage-data.com/mcp