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Sewage treatment plant, major discharger, Tybee Island, Georgia. NPDES permit GA0020061, in force until Mar 31, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | minimum | ≥ 5 mg/L | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 26 mg/L | May–Sep |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 39 mg/L | May–Sep |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 223 lb/d | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 249 lb/d | May–Sep |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 278 lb/d | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 312 lb/d | May–Sep |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | weekly average | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) | all year |
| BOD, 5-day, 20 deg. C | weekly average | report only (lb/d) | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Solids, total suspended | monthly average | ≤ 26 mg/L | May–Sep |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Solids, total suspended | weekly average | ≤ 39 mg/L | May–Sep |
| Solids, total suspended | monthly average | ≤ 223 lb/d | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Solids, total suspended | monthly average | ≤ 249 lb/d | May–Sep |
| Solids, total suspended | weekly average | ≤ 278 lb/d | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Solids, total suspended | weekly average | ≤ 312 lb/d | May–Sep |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Solids, total suspended | weekly average | report only (mg/L) | all year |
| Solids, total suspended | monthly average | report only (lb/d) | all year |
| Solids, total suspended | weekly average | report only (lb/d) | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 17.4 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 15.1 mg/L | May–Sep |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 26.1 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 22.7 mg/L | May–Sep |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 129 lb/d | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 145 lb/d | May–Sep |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 161 lb/d | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 181 lb/d | May–Sep |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year |
| Phosphate, ortho [as P] | monthly average | report only (mg/L) | all year |
| Flow, in conduit or thru treatment plant | monthly average | ≤ .89 MGD | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Flow, in conduit or thru treatment plant | monthly average | ≤ 1.15 MGD | May–Sep |
| Flow, in conduit or thru treatment plant | weekly average | ≤ 1.11 MGD | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Flow, in conduit or thru treatment plant | weekly average | ≤ 1.44 MGD | May–Sep |
| Chlorine, total residual | maximum | ≤ .5 mg/L | all year |
| Enterococci | monthly geometric mean | ≤ 35 #/100mL | all year |
| Enterococci | weekly geometric mean | ≤ 130 #/100mL | all year |
| Solids, sludge, total, dry weight | monthly total | report only (dry ton) | all year |
| BOD, 5-day, percent removal | minimum | ≥ 85 % | all year |
| Solids, suspended percent removal | minimum | ≥ 85 % | all year |
| NOEL Static Renewal 7Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | minimum | report only (%) | all year |
| Noel Statre 7Day Chronic Menidia | minimum | report only (%) | all year |
Cited limits by parameter: Georgia's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/GA0020061 · MCP: https://passage-data.com/mcp