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Ameresco

Electric Services, Aiken, South Carolina. NPDES permit SC0049107 expired Jun 30, 2016; its limits still apply. Last 12 months: over a limit once (last January 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form 1 monthly (23 values), form 2 every 51 months
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
January 2026Length of longest pH excursion, instantaneous maximum93≤ 60 min55%

Limits in force (25)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitdaily maximum≤ 90 deg Fall year
Oxygen, dissolved [DO]instantaneous minimumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year
pHinstantaneous minimumreport only (SU)all year
pHinstantaneous maximumreport only (SU)all year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmonthly average≤ 119 lb/dall year
Solids, total suspendeddaily maximum≤ 336 lb/dall year
Oil & Greasemonthly average≤ 37 lb/dall year
Oil & Greasedaily maximum≤ 49 lb/dall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ 1 mg/Lall year
Chlorine, total residualdaily maximum≤ 1.7 mg/Lall year
Chlorine, free availablemonthly average≤ .45 lb/dall year
Chlorine, free availabledaily maximum≤ 1.12 lb/dall year
Length of longest pH excursioninstantaneous maximum≤ 60 minall year
% of time exceeding pH limitsinstantaneous maximum≤ 1 %all year
LC50 Static Renewal 48Hr Acute Daphnia ambiguadaily maximumreport only (%)all year
IC25 Static Renewal 7 Day Chronic Daphnia ambiguadaily maximumreport only (%)all year

How strict are these limits?

Cited limits by parameter: South Carolina's rules and the federal ones.

Same industry: the 17 Electric Services permits in South Carolina.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/SC0049107 · MCP: https://passage-data.com/mcp