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Fish Hatcheries And Preserves, Mishawaka, Indiana. NPDES permit IN0049875, in force until Apr 30, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | quarterly minimum | ≥ 6 SU | Mar, Jun, Sep, Dec | 001 |
| pH | quarterly minimum | ≥ 6 SU | Mar, Jun, Sep, Dec | 001 |
| pH | quarterly maximum | ≤ 9 SU | Mar, Jun, Sep, Dec | 001 |
| pH | quarterly maximum | ≤ 9 SU | Mar, Jun, Sep, Dec | 001 |
| Solids, total suspended | quarterly average | ≤ 30 mg/L | Mar, Jun, Sep, Dec | 001 |
| Solids, total suspended | quarterly average | ≤ 30 mg/L | Mar, Jun, Sep, Dec | 001 |
| Solids, total suspended | quarterly maximum | ≤ 45 mg/L | Mar, Jun, Sep, Dec | 001 |
| Solids, total suspended | quarterly maximum | ≤ 45 mg/L | Mar, Jun, Sep, Dec | 001 |
| Solids, total suspended | quarterly average | ≤ 275 lb/d | Mar, Jun, Sep, Dec | 001 |
| Solids, total suspended | quarterly average | ≤ 275 lb/d | Mar, Jun, Sep, Dec | 001 |
| Solids, total suspended | quarterly maximum | ≤ 413 lb/d | Mar, Jun, Sep, Dec | 001 |
| Solids, total suspended | quarterly maximum | ≤ 413 lb/d | Mar, Jun, Sep, Dec | 001 |
| Nitrogen, ammonia total [as N] | quarterly average | ≤ .75 mg/L | Mar, Jun, Sep, Dec | 001 |
| Nitrogen, ammonia total [as N] | quarterly average | ≤ .75 mg/L | Mar, Jun, Sep, Dec | 001 |
| Nitrogen, ammonia total [as N] | quarterly maximum | ≤ 1.5 mg/L | Mar, Jun, Sep, Dec | 001 |
| Nitrogen, ammonia total [as N] | quarterly maximum | ≤ 1.5 mg/L | Mar, Jun, Sep, Dec | 001 |
| Nitrogen, ammonia total [as N] | quarterly average | ≤ 6.9 lb/d | Mar, Jun, Sep, Dec | 001 |
| Nitrogen, ammonia total [as N] | quarterly average | ≤ 6.9 lb/d | Mar, Jun, Sep, Dec | 001 |
| Nitrogen, ammonia total [as N] | quarterly maximum | ≤ 13.8 lb/d | Mar, Jun, Sep, Dec | 001 |
| Nitrogen, ammonia total [as N] | quarterly maximum | ≤ 13.8 lb/d | Mar, Jun, Sep, Dec | 001 |
| Flow, in conduit or thru treatment plant | quarterly average | report only (MGD) | Mar, Jun, Sep, Dec | 001 |
| Flow, in conduit or thru treatment plant | quarterly average | report only (MGD) | Mar, Jun, Sep, Dec | 001 |
| Flow, total | quarterly total | report only (Mgal/qtr) | Mar, Jun, Sep, Dec | 001 |
| Flow, total | quarterly total | report only (Mgal/qtr) | Mar, Jun, Sep, Dec | 001 |
| pH | quarterly minimum | report only (SU) | Mar, Jun, Sep, Dec | 002 |
| pH | quarterly minimum | report only (SU) | Mar, Jun, Sep, Dec | 002 |
| pH | quarterly maximum | report only (SU) | Mar, Jun, Sep, Dec | 002 |
| pH | quarterly maximum | report only (SU) | Mar, Jun, Sep, Dec | 002 |
| Solids, total suspended | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Solids, total suspended | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Solids, total suspended | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Solids, total suspended | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Solids, total suspended | quarterly average | report only (lb/d) | Mar, Jun, Sep, Dec | 002 |
| Solids, total suspended | quarterly average | report only (lb/d) | Mar, Jun, Sep, Dec | 002 |
| Solids, total suspended | quarterly maximum | report only (lb/d) | Mar, Jun, Sep, Dec | 002 |
| Solids, total suspended | quarterly maximum | report only (lb/d) | Mar, Jun, Sep, Dec | 002 |
| Nitrogen, ammonia total [as N] | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Nitrogen, ammonia total [as N] | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Nitrogen, ammonia total [as N] | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Nitrogen, ammonia total [as N] | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Nitrogen, ammonia total [as N] | quarterly average | report only (lb/d) | Mar, Jun, Sep, Dec | 002 |
| Nitrogen, ammonia total [as N] | quarterly average | report only (lb/d) | Mar, Jun, Sep, Dec | 002 |
| Nitrogen, ammonia total [as N] | quarterly maximum | report only (lb/d) | Mar, Jun, Sep, Dec | 002 |
| Nitrogen, ammonia total [as N] | quarterly maximum | report only (lb/d) | Mar, Jun, Sep, Dec | 002 |
| Flow, in conduit or thru treatment plant | quarterly average | report only (MGD) | Mar, Jun, Sep, Dec | 002 |
| Flow, in conduit or thru treatment plant | quarterly average | report only (MGD) | Mar, Jun, Sep, Dec | 002 |
| Flow, total | quarterly total | report only (Mgal/qtr) | Mar, Jun, Sep, Dec | 002 |
| Flow, total | quarterly total | report only (Mgal/qtr) | Mar, Jun, Sep, Dec | 002 |
Cited limits by parameter: Indiana's rules and the federal ones.
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