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Cement, Hydraulic, major discharger, Alpena, Michigan. NPDES permit MI0001988, in force until Oct 1, 2029. Last 12 months: over a limit 4 times (last August 2026), 9 of 99 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| April 2026 | Solids, total suspended, daily maximum | 54 | ≤ 50 mg/L | 8% |
| May 2026 | pH, daily maximum | 9.3 | ≤ 9 SU | — |
| June 2026 | pH, daily maximum | 9.2 | ≤ 9 SU | — |
| August 2026 | pH, daily maximum | 9.9 | ≤ 9 SU | — |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 001 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 4 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 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 002 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 4 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 002 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 003 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 4 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 003 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 004 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 4 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 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 004 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 007 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 4 mg/L | all year | 007 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 007 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 007 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 010 |
| Conductivity | daily maximum | report only (umho/cm) | all year | 010 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 4 mg/L | all year | 010 |
| pH | daily minimum | ≥ 6.5 SU | all year | 010 |
| pH | daily maximum | ≤ 9 SU | all year | 010 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 010 |
| Sulfide, dissolved, [as S] | daily maximum | report only (ug/L) | all year | 010 |
| Sulfide, dissolved, [as S] | daily maximum | report only (lb/d) | all year | 010 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 010 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 010 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 010 |
| Mercury, total [as Hg] | monthly average | report only (ng/L) | all year | 010 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 010 |
| Mercury, total [as Hg] | monthly average | report only (lb/d) | all year | 010 |
| Mercury, total [as Hg] | daily maximum | report only (lb/d) | all year | 010 |
| Mercury, total [as Hg] | 12-month average | ≤ 3 ng/L | all year | 010 |
| Mercury, total [as Hg] | 12-month average | ≤ .0003 lb/d | all year | 010 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 010 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 011 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 4 mg/L | all year | 011 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 011 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 011 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 011 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | IN1 |
| Equipment inspection - visual | value | report only (N=0;Y=1) | all year | IN1 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | IN1 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | IN1 |
| Equipment inspection - visual | value | report only (N=0;Y=1) | all year | IN2 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | IN2 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | IN2 |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit, daily maximum | 100 deg F | new | 73.1 deg F (11 values) | 0.731× |
Cited limits by parameter: Michigan's rules and the federal ones.
Same industry: the 7 Stone, Clay, Glass and Concrete Products permits in Michigan.
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