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Sewage treatment plant, Alpharetta, Georgia. NPDES permit GA0050244 expired Apr 30, 2026; its limits still apply. Last 12 months: over a limit 2 times (last August 2026), 5 of 42 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | Coliform, fecal general, maximum | 109 #/100mL | ≤ 100 #/100mL | 9% |
| August 2026 | Coliform, fecal general, maximum | 272 #/100mL | ≤ 100 #/100mL | 172% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | > 6 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 7.5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 9.5 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 11.8 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (kg/d) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | report only (kg/d) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| pH | minimum | ≥ 6 SU | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| pH | maximum | ≤ 8.5 SU | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | weekly average | ≤ 7.5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 9.5 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | weekly average | ≤ 11.8 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | weekly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | monthly average | report only (kg/d) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | weekly average | report only (kg/d) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 1.5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.9 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 2.4 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .16 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Phosphorus, total [as P] | weekly average | ≤ .24 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .3 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Phosphorus, total [as P] | weekly average | ≤ .38 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Phosphate, ortho [as P] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ .625 MGD | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 0 MGD | May–Oct | 001 |
| Chlorine, total residual | daily maximum | ≤ .021 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Flow, in conduit or thru treatment plant | cumulative total | ≤ 54.8 Mgal | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Coliform, fecal general | monthly geometric mean | ≤ 23 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Coliform, fecal general | weekly geometric mean | ≤ 46 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, sludge, total, dry weight | monthly total | report only (dry ton) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, percent removal | minimum | ≥ 85 % | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, suspended percent removal | minimum | ≥ 85 % | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Turbidity | maximum | ≤ 3 NTU | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 5 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 5 mg/L | all year | 002 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | ≤ .5 MGD | all year | 002 |
| Flow, in conduit or thru treatment plant | weekly average | ≤ .625 MGD | all year | 002 |
| Coliform, fecal general | monthly geometric mean | ≤ 23 #/100mL | all year | 002 |
| Coliform, fecal general | maximum | ≤ 100 #/100mL | all year | 002 |
| Solids, sludge, total, dry weight | monthly total | report only (dry ton) | May–Oct | 002 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 004 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 004 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 004 |
Cited limits by parameter: Georgia's rules and the federal ones.
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