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Calpine Mid Merit II LLC

Electric Services, major discharger, Delta, Pennsylvania. NPDES permit PA0088781, in force until Nov 30, 2029. Last 12 months: over a limit 2 times (last April 2026), 9 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (1 value), outfall 012 form A monthly (8 values), outfall 003 form Y yearly, outfall 012 form Q quarterly
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 29 reports late

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

Period endingParameterReportedLimitOver by
April 2026Solids, total suspended, daily maximum69.9 mg/L≤ 60 mg/L17%
April 2026Solids, total suspended, monthly average35.5 mg/L≤ 30 mg/L18%

Limits in force (28)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year001
pHdaily maximumreport only (SU)all year003
Solids, total suspendeddaily maximumreport only (mg/L)all year003
Oil & Greasedaily maximumreport only (mg/L)all year003
Copper, total [as Cu]daily maximumreport only (mg/L)all year003
Iron, total [as Fe]daily maximumreport only (mg/L)all year003
Nickel, total [as Ni]daily maximumreport only (mg/L)all year003
Zinc, total [as Zn]daily maximumreport only (mg/L)all year003
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year012
pHdaily minimum≥ 6 SUall year012
pHinstantaneous maximum≤ 9 SUall year012
Solids, total suspendedmonthly average≤ 30 mg/Lall year012
Solids, total suspendeddaily maximum≤ 60 mg/Lall year012
Chloride [as Cl]daily maximumreport only (mg/L)all year012
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year012
Copper, total [as Cu]quarterly averagereport only (mg/L)all year012
Copper, total [as Cu]daily maximumreport only (mg/L)all year012
Copper, total [as Cu]quarterly averagereport only (lb/d)all year012
Copper, total [as Cu]daily maximumreport only (lb/d)all year012
Aluminum, total [as Al]quarterly averagereport only (mg/L)all year012
Aluminum, total [as Al]daily maximumreport only (mg/L)all year012
Aluminum, total [as Al]quarterly averagereport only (lb/d)all year012
Aluminum, total [as Al]daily maximumreport only (lb/d)all year012
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year012
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year012
Chlorine, free availabledaily maximum≤ .2 mg/Lall year012
Solids, total dissolveddaily maximumreport only (mg/L)all year012
Bromide [as Br]daily maximumreport only (mg/L)all year012

How strict are these limits?

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

Same industry: the 63 Electric Services permits in Pennsylvania.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/PA0088781 · MCP: https://passage-data.com/mcp