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Martin Marietta Materials, Inc

Crushed And Broken Limestone, Auburn, Alabama. NPDES permit AL0002640, in force until Mar 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form 1 quarterly (6 values), outfall 002 form 1 quarterly (6 values), outfall 003 form 1 quarterly (6 values), outfall 004 form 1 quarterly (6 values), outfall 006 form 1 quarterly (6 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 6 required values missing, 0 of 60 reports late

Limits in force (30)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 8.5 SUall year001
Solids, total suspendedmonthly average≤ 25 mg/Lall year001
Solids, total suspendeddaily maximum≤ 45 mg/Lall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
pHdaily minimum≥ 6 SUall year002
pHdaily maximum≤ 8.5 SUall year002
Solids, total suspendedmonthly average≤ 25 mg/Lall year002
Solids, total suspendeddaily maximum≤ 45 mg/Lall year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
pHdaily minimum≥ 6 SUall year003
pHdaily maximum≤ 8.5 SUall year003
Solids, total suspendedmonthly average≤ 25 mg/Lall year003
Solids, total suspendeddaily maximum≤ 45 mg/Lall year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
pHdaily minimum≥ 6 SUall year004
pHdaily maximum≤ 8.5 SUall year004
Solids, total suspendedmonthly average≤ 25 mg/Lall year004
Solids, total suspendeddaily maximum≤ 45 mg/Lall 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
pHdaily minimum≥ 6 SUall year006
pHdaily maximum≤ 8.5 SUall year006
Solids, total suspendedmonthly average≤ 25 mg/Lall year006
Solids, total suspendeddaily maximum≤ 45 mg/Lall year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006

How strict are these limits?

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

Same industry: the 206 Mining and Quarrying of Nonmetallic Minerals permits in Alabama.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AL0002640 · MCP: https://passage-data.com/mcp