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Hanging Rock Power Company LLC

Electric Services, major discharger, Ironton, Ohio. NPDES permit OH0127931, in force until Sep 30, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (13 values), outfall 601 form A monthly (8 values), outfall 602 form A monthly (8 values), outfall 603 form A monthly (8 values), outfall 604 form A monthly (8 values), outfall 801 form A monthly (2 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 74 reports late

Limits in force (51)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendeddaily maximum≤ 100 mg/Lall year001
Oil and grease, hexane extr methodmonthly averagereport only (mg/L)all year001
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)Jun, Dec001
Phosphorus, total [as P]daily maximumreport only (mg/L)Jun, Dec001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualdaily maximum≤ .038 mg/Lall year001
Mercury, total low levelmonthly averagereport only (ng/L)Jun, Dec001
Mercury, total low leveldaily maximumreport only (ng/L)Jun, Dec001
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)all year001
Solids, total dissolved- 180 deg. Cdaily maximumreport only (mg/L)all year001
pHdaily minimumreport only (SU)Mar, Jun, Sep, Dec601
pHdaily maximumreport only (SU)Mar, Jun, Sep, Dec601
Solids, total suspendedmonthly average≤ 30 mg/LMar, Jun, Sep, Dec601
Solids, total suspendeddaily maximum≤ 100 mg/LMar, Jun, Sep, Dec601
Oil and grease, hexane extr methodmonthly average≤ 15 mg/LMar, Jun, Sep, Dec601
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/LMar, Jun, Sep, Dec601
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Mar, Jun, Sep, Dec601
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)Mar, Jun, Sep, Dec601
pHdaily minimumreport only (SU)Mar, Jun, Sep, Dec602
pHdaily maximumreport only (SU)Mar, Jun, Sep, Dec602
Solids, total suspendedmonthly average≤ 30 mg/LMar, Jun, Sep, Dec602
Solids, total suspendeddaily maximum≤ 100 mg/LMar, Jun, Sep, Dec602
Oil and grease, hexane extr methodmonthly average≤ 15 mg/LMar, Jun, Sep, Dec602
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/LMar, Jun, Sep, Dec602
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Mar, Jun, Sep, Dec602
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)Mar, Jun, Sep, Dec602
pHdaily minimumreport only (SU)Mar, Jun, Sep, Dec603
pHdaily maximumreport only (SU)Mar, Jun, Sep, Dec603
Solids, total suspendedmonthly average≤ 30 mg/LMar, Jun, Sep, Dec603
Solids, total suspendeddaily maximum≤ 100 mg/LMar, Jun, Sep, Dec603
Oil and grease, hexane extr methodmonthly average≤ 15 mg/LMar, Jun, Sep, Dec603
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/LMar, Jun, Sep, Dec603
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Mar, Jun, Sep, Dec603
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)Mar, Jun, Sep, Dec603
pHdaily minimumreport only (SU)Mar, Jun, Sep, Dec604
pHdaily maximumreport only (SU)Mar, Jun, Sep, Dec604
Solids, total suspendedmonthly average≤ 30 mg/LMar, Jun, Sep, Dec604
Solids, total suspendeddaily maximum≤ 100 mg/LMar, Jun, Sep, Dec604
Oil and grease, hexane extr methodmonthly average≤ 15 mg/LMar, Jun, Sep, Dec604
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/LMar, Jun, Sep, Dec604
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Mar, Jun, Sep, Dec604
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)Mar, Jun, Sep, Dec604
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year801
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year801

How strict are these limits?

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

Same industry: the 31 Electric Services permits in Ohio.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OH0127931 · MCP: https://passage-data.com/mcp