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Martin Marietta Materials, Inc - Weeping Water Mine

Crushed And Broken Limestone, Weeping Water, Nebraska. NPDES permit NE0000388, in force until Dec 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 002 form Q quarterly (8 values), outfall 004 form Q quarterly (8 values), outfall 005 form Q quarterly (8 values), outfall 006 form Q quarterly (8 values), outfall 002 form P every 60 months, outfall 004 form P every 54 months, and 2 more forms
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 25 reports late

Limits in force (56)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitvaluereport only (deg F)all year002
BOD, 5-day, 20 deg. Cvaluereport only (mg/L)all year002
pHdaily minimum≥ 6.5 SUall year002
pHdaily maximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 25 mg/Lall year002
Solids, total suspendeddaily maximum≤ 45 mg/Lall year002
Solids, total suspendedvaluereport only (mg/L)all year002
Nitrogen, ammonia total [as N]valuereport only (mg/L)all year002
Carbon, tot organic [TOC]valuereport only (mg/L)all year002
Hydrocarbons, total gas chromatographmonthly averagereport only (mg/L)all year002
Hydrocarbons, total gas chromatographdaily maximum≤ 10 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
Chemical Oxygen Demand [COD]valuereport only (mg/L)all year002
Temperature, water deg. fahrenheitvaluereport only (deg F)all year004
BOD, 5-day, 20 deg. Cvaluereport only (mg/L)all year004
pHminimum≥ 6.5 SUall year004
pHmaximum≤ 9 SUall year004
Solids, total suspendedmonthly average≤ 25 mg/Lall year004
Solids, total suspendeddaily maximum≤ 45 mg/Lall year004
Solids, total suspendedvaluereport only (mg/L)all year004
Nitrogen, ammonia total [as N]valuereport only (mg/L)all year004
Carbon, tot organic [TOC]valuereport only (mg/L)all year004
Hydrocarbons, total gas chromatographmonthly averagereport only (mg/L)all year004
Hydrocarbons, total gas chromatographdaily maximum≤ 10 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
Chemical Oxygen Demand [COD]valuereport only (mg/L)all year004
Temperature, water deg. fahrenheitvaluereport only (deg F)all year005
BOD, 5-day, 20 deg. Cvaluereport only (mg/L)all year005
pHminimum≥ 6.5 SUall year005
pHmaximum≤ 9 SUall year005
Solids, total suspendedvaluereport only (mg/L)all year005
Solids, total suspendedmonthly average≤ 25 mg/Lall year005
Solids, total suspendeddaily maximum≤ 45 mg/Lall year005
Nitrogen, ammonia total [as N]valuereport only (mg/L)all year005
Carbon, tot organic [TOC]valuereport only (mg/L)all year005
Hydrocarbons, total gas chromatographmonthly averagereport only (mg/L)all year005
Hydrocarbons, total gas chromatographdaily maximum≤ 10 mg/Lall year005
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year005
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year005
Chemical Oxygen Demand [COD]valuereport only (mg/L)all year005
Temperature, water deg. fahrenheitvaluereport only (deg F)all year006
BOD, 5-day, 20 deg. Cvaluereport only (mg/L)all year006
pHminimum≥ 6.5 SUall year006
pHmaximum≤ 9 SUall year006
Solids, total suspendedvaluereport only (mg/L)all year006
Solids, total suspendedmonthly average≤ 25 mg/Lall year006
Solids, total suspendeddaily maximum≤ 45 mg/Lall year006
Nitrogen, ammonia total [as N]valuereport only (mg/L)all year006
Carbon, tot organic [TOC]valuereport only (mg/L)all year006
Hydrocarbons, total gas chromatographmonthly averagereport only (mg/L)all year006
Hydrocarbons, total gas chromatographdaily maximum≤ 10 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
Chemical Oxygen Demand [COD]valuereport only (mg/L)all year006

How strict are these limits?

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

Same industry: the 11 Mining and Quarrying of Nonmetallic Minerals permits in Nebraska.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NE0000388 · MCP: https://passage-data.com/mcp