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Holcim (US) Inc.

Cement, Hydraulic, Holly Hill, South Carolina. NPDES permit SC0002992 expired Sep 30, 2025; its limits still apply. Last 12 months: over a limit once (last February 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 004 form 1 monthly (19 values), outfall 004 form 2 quarterly (2 values), outfall 004 form 3 yearly (2 values), outfall 02A form 1 monthly (6 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 2 of 30 reports late

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

Period endingParameterReportedLimitOver by
February 2026BOD, 5-day, 20 deg. C, monthly average37≤ 30 mg/L23%

Limits in force (29)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily maximum= 90 deg Fall year004
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year004
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year004
Temperature, water deg. fahrenheitdaily maximum= 5 deg Fall year004
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year004
Oxygen demand, chem. [high level] [COD]monthly averagereport only (mg/L)all year004
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year004
pHinstantaneous minimum= 6 SUall year004
pHinstantaneous maximum= 8.5 SUall year004
Solids, total suspendedmonthly average≤ 25 mg/Lall year004
Solids, total suspendeddaily maximum≤ 50 mg/Lall year004
Oil & Greasemonthly average= 10 mg/Lall year004
Oil & Greasedaily maximum= 15 mg/Lall year004
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year004
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year004
Thallium, total [as Tl]monthly averagereport only (ug/L)all year004
Thallium, total [as Tl]daily maximumreport only (ug/L)all year004
Selenium, total [as Se]monthly averagereport only (ug/L)all year004
Selenium, total [as Se]daily minimumreport only (ug/L)all year004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004
Chlorine, total residualmonthly average= 11 ug/Lall year004
Chlorine, total residualdaily maximum= 19 ug/Lall year004
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year02A
BOD, 5-day, 20 deg. Cdaily maximum≤ 60 mg/Lall year02A
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year02A
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year02A
E. coli30-day geometric mean= 126 #/100mLall year02A
E. colidaily maximum= 349 #/100mLall year02A

How strict are these limits?

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

Same industry: the 5 Stone, Clay, Glass and Concrete Products 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/SC0002992 · MCP: https://passage-data.com/mcp