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Sewage treatment plant, Mapleton, Maine. NPDES permit MEU508147, in force until Nov 30, 2028. Last 12 months: no values over a limit, 1 of 57 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 100 mg/L | all year | 001 |
| pH | minimum | report only (SU) | all year | 001 |
| pH | maximum | report only (SU) | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Lagoon freeboard | daily minimum | report only (ft) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | May, Oct | MW1 |
| Specific conductance | daily maximum | report only (umho/cm) | May, Oct | MW1 |
| pH | minimum | report only (SU) | May, Oct | MW1 |
| pH | maximum | report only (SU) | May, Oct | MW1 |
| Solids, total suspended | daily maximum | report only (mg/L) | May, Oct | MW1 |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 10 mg/L | May, Oct | MW1 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | May, Oct | MW1 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | May, Oct | MW2 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | May, Oct | MW2 |
| Specific conductance | daily maximum | report only (umho/cm) | May, Oct | MW2 |
| Specific conductance | daily maximum | report only (umho/cm) | May, Oct | MW2 |
| pH | maximum | report only (SU) | May, Oct | MW2 |
| pH | daily maximum | report only (SU) | May, Oct | MW2 |
| Solids, total suspended | daily maximum | report only (mg/L) | May, Oct | MW2 |
| Solids, total suspended | daily maximum | report only (mg/L) | May, Oct | MW2 |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 10 mg/L | May, Oct | MW2 |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 10 mg/L | May, Oct | MW2 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | May, Oct | MW2 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | May, Oct | MW2 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | May, Oct | MW3 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | May, Oct | MW3 |
| Specific conductance | daily maximum | report only (umho/cm) | May, Oct | MW3 |
| Specific conductance | daily maximum | report only (umho/cm) | May, Oct | MW3 |
| pH | maximum | report only (SU) | May, Oct | MW3 |
| pH | maximum | report only (SU) | May, Oct | MW3 |
| Solids, total suspended | daily maximum | report only (mg/L) | May, Oct | MW3 |
| Solids, total suspended | daily maximum | report only (mg/L) | May, Oct | MW3 |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 10 mg/L | May, Oct | MW3 |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 10 mg/L | May, Oct | MW3 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | May, Oct | MW3 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | May, Oct | MW3 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | May, Oct | MW4 |
| Specific conductance | daily maximum | report only (umho/cm) | May, Oct | MW4 |
| pH | maximum | report only (SU) | May, Oct | MW4 |
| Solids, total suspended | daily maximum | report only (mg/L) | May, Oct | MW4 |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 10 mg/L | May, Oct | MW4 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | May, Oct | MW4 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | May, Oct | MW5 |
| Specific conductance | daily maximum | report only (umho/cm) | May, Oct | MW5 |
| pH | maximum | report only (SU) | May, Oct | MW5 |
| Solids, total suspended | daily maximum | report only (mg/L) | May, Oct | MW5 |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 10 mg/L | May, Oct | MW5 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | May, Oct | MW5 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | May, Oct | MW6 |
| Specific conductance | daily maximum | report only (umho/cm) | May, Oct | MW6 |
| pH | maximum | report only (SU) | May, Oct | MW6 |
| Solids, total suspended | daily maximum | report only (mg/L) | May, Oct | MW6 |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 10 mg/L | May, Oct | MW6 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | May, Oct | MW6 |
| Application rate, gallons spray irrigation | weekly maximum | ≤ 645000 gal | Apr–Nov | SF2 |
| Flow, total | monthly total | report only (gal) | Apr–Nov | SF2 |
| Application rate, gallons spray irrigation | weekly maximum | ≤ 663000 gal | Apr–Nov | SF3 |
| Flow, total | monthly total | report only (gal) | Apr–Nov | SF3 |
| Application rate, gallons spray irrigation | weekly maximum | ≤ 488700 gal | Apr–Oct | SM1 |
| Flow, total | monthly total | report only (gal) | all year | SM1 |
| Flow, total | annual total | ≤ 24000000 gal | all year | SM1 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Aug | UD1 |
Cited limits by parameter: Maine'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/MEU508147 · MCP: https://passage-data.com/mcp