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Gasoline Service Stations, Knoxville, Tennessee. NPDES permit TN0064548, in force until Jul 31, 2028. Last 12 months: over a limit 35 times (last September 2026), 2 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| October 2025 | 002 | Nitrogen, ammonia total [as N], daily maximum | 12.6 mg/L | ≤ 2.58 mg/L | 388% |
| October 2025 | 002 | Nitrogen, ammonia total [as N], monthly average | 6.755 mg/L | ≤ .56 mg/L | 1106% |
| October 2025 | 002 | Solids, total suspended, daily maximum | 58.8 mg/L | ≤ 40 mg/L | 47% |
| October 2025 | 002 | Solids, total suspended, monthly average | 40.6 mg/L | ≤ 30 mg/L | 35% |
| October 2025 | 02A | E. coli, monthly average | 286 #/100mL | ≤ 126 #/100mL | 127% |
| November 2025 | 002 | Nitrogen, ammonia total [as N], daily maximum | 26 mg/L | ≤ 5.62 mg/L | 363% |
| November 2025 | 002 | Nitrogen, ammonia total [as N], monthly average | 16.46 mg/L | ≤ 1.07 mg/L | 1438% |
| November 2025 | 02A | E. coli, monthly average | 210 #/100mL | ≤ 126 #/100mL | 67% |
| December 2025 | 002 | Nitrogen, ammonia total [as N], monthly average | 2.435 mg/L | ≤ 1.07 mg/L | 128% |
| January 2026 | 002 | Nitrogen, ammonia total [as N], monthly average | 3.09 mg/L | ≤ 1.07 mg/L | 189% |
| February 2026 | 002 | Nitrogen, ammonia total [as N], daily maximum | 23.4 mg/L | ≤ 5.62 mg/L | 316% |
| February 2026 | 002 | Nitrogen, ammonia total [as N], monthly average | 16.5 mg/L | ≤ 1.07 mg/L | 1442% |
| February 2026 | 002 | Solids, total suspended, monthly average | 31.5 mg/L | ≤ 30 mg/L | 5% |
| February 2026 | 002 | pH, maximum | 9.13 SU | ≤ 9 SU | — |
| March 2026 | 002 | Nitrogen, ammonia total [as N], monthly average | 1.747 mg/L | ≤ 1.07 mg/L | 63% |
| April 2026 | 002 | Nitrogen, ammonia total [as N], daily maximum | 13.4 mg/L | ≤ 5.62 mg/L | 138% |
| April 2026 | 002 | Nitrogen, ammonia total [as N], monthly average | 8.935 mg/L | ≤ 1.07 mg/L | 735% |
| May 2026 | 002 | Nitrogen, ammonia total [as N], daily maximum | 20.1 mg/L | ≤ 2.58 mg/L | 679% |
| May 2026 | 002 | Nitrogen, ammonia total [as N], monthly average | 12.515 mg/L | ≤ .56 mg/L | 2135% |
| May 2026 | 002 | Solids, total suspended, daily maximum | 40.5 mg/L | ≤ 40 mg/L | 1% |
| May 2026 | 002 | Solids, total suspended, monthly average | 32.65 mg/L | ≤ 30 mg/L | 9% |
| June 2026 | 002 | Nitrogen, ammonia total [as N], daily maximum | 3.28 mg/L | ≤ 2.58 mg/L | 27% |
| June 2026 | 002 | Nitrogen, ammonia total [as N], monthly average | 2.375 mg/L | ≤ .56 mg/L | 324% |
| July 2026 | 002 | Nitrogen, ammonia total [as N], daily maximum | 14.1 mg/L | ≤ 2.58 mg/L | 447% |
| July 2026 | 002 | Nitrogen, ammonia total [as N], monthly average | 7.94 mg/L | ≤ .56 mg/L | 1318% |
| July 2026 | 02A | E. coli, daily maximum | 5600 #/100mL | ≤ 941 #/100mL | 495% |
| July 2026 | 02A | E. coli, monthly average | 3323.33 #/100mL | ≤ 126 #/100mL | 2538% |
| August 2026 | 002 | Nitrogen, ammonia total [as N], daily maximum | 18.5 mg/L | ≤ 2.58 mg/L | 617% |
| August 2026 | 002 | Nitrogen, ammonia total [as N], monthly average | 12.895 mg/L | ≤ .56 mg/L | 2203% |
| August 2026 | 02A | E. coli, daily maximum | 1700 #/100mL | ≤ 941 #/100mL | 81% |
| August 2026 | 02A | E. coli, monthly average | 142.4 #/100mL | ≤ 126 #/100mL | 13% |
| September 2026 | 002 | Nitrogen, ammonia total [as N], daily maximum | 7.04 mg/L | ≤ 2.58 mg/L | 173% |
| September 2026 | 002 | Nitrogen, ammonia total [as N], monthly average | 7.04 mg/L | ≤ .56 mg/L | 1157% |
| September 2026 | 02A | E. coli, daily maximum | 10000 #/100mL | ≤ 941 #/100mL | 963% |
| September 2026 | 02A | E. coli, monthly average | 466.6 #/100mL | ≤ 126 #/100mL | 270% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 40 mg/L | all year | 002 |
| Oil and grease, hexane extr method | monthly average | ≤ 10 mg/L | all year | 002 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.07 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .56 mg/L | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.62 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.58 mg/L | May–Oct | 002 |
| Benzene | daily maximum | ≤ .5 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 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 002 |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | minimum | report only (%) | all year | 002 |
| LC50 Static 48Hr Acute Pimephales promelas | minimum | report only (%) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 02A |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 02A |
| E. coli | monthly average | ≤ 126 #/100mL | all year | 02A |
| E. coli | daily maximum | ≤ 941 #/100mL | all year | 02A |
Cited limits by parameter: Tennessee's rules and the federal ones.
Same industry: the 13 Automotive Dealers and Gasoline Service Stations permits in Tennessee.
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