Martin Marietta Materials, Inc - Weeping Water Mine

NPDES permit NE0000388 · Minor NON-POTW · effective, expires 2030-12-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 18 forms filed late

Last period with anything received: 2026-06-30.

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among NE permits in EPA's filings — check your permit).

Limits in force (56)

OutfallParameterStatisticLimitMonths
002Temperature, water deg. fahrenheitVALUE report only all year
002BOD, 5-day, 20 deg. CVALUE report only all year
002pHDAILY MN >= 6.5 SU all year
002pHDAILY MX <= 9 SU all year
002Solids, total suspendedMO AVG <= 25 mg/L all year
002Solids, total suspendedDAILY MX <= 45 mg/L all year
002Solids, total suspendedVALUE report only all year
002Nitrogen, ammonia total [as N]VALUE report only all year
002Carbon, tot organic [TOC]VALUE report only all year
002Hydrocarbons, total gas chromatographMO AVG report only all year
002Hydrocarbons, total gas chromatographDAILY MX <= 10 mg/L all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chemical Oxygen Demand [COD]VALUE report only all year
004Temperature, water deg. fahrenheitVALUE report only all year
004BOD, 5-day, 20 deg. CVALUE report only all year
004pHMINIMUM >= 6.5 SU all year
004pHMAXIMUM <= 9 SU all year
004Solids, total suspendedMO AVG <= 25 mg/L all year
004Solids, total suspendedDAILY MX <= 45 mg/L all year
004Solids, total suspendedVALUE report only all year
004Nitrogen, ammonia total [as N]VALUE report only all year
004Carbon, tot organic [TOC]VALUE report only all year
004Hydrocarbons, total gas chromatographMO AVG report only all year
004Hydrocarbons, total gas chromatographDAILY MX <= 10 mg/L all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Chemical Oxygen Demand [COD]VALUE report only all year
005Temperature, water deg. fahrenheitVALUE report only all year
005BOD, 5-day, 20 deg. CVALUE report only all year
005pHMINIMUM >= 6.5 SU all year
005pHMAXIMUM <= 9 SU all year
005Solids, total suspendedVALUE report only all year
005Solids, total suspendedMO AVG <= 25 mg/L all year
005Solids, total suspendedDAILY MX <= 45 mg/L all year
005Nitrogen, ammonia total [as N]VALUE report only all year
005Carbon, tot organic [TOC]VALUE report only all year
005Hydrocarbons, total gas chromatographMO AVG report only all year
005Hydrocarbons, total gas chromatographDAILY MX <= 10 mg/L all year
005Flow, in conduit or thru treatment plantMO AVG report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
005Chemical Oxygen Demand [COD]VALUE report only all year
006Temperature, water deg. fahrenheitVALUE report only all year
006BOD, 5-day, 20 deg. CVALUE report only all year
006pHMINIMUM >= 6.5 SU all year
006pHMAXIMUM <= 9 SU all year
006Solids, total suspendedVALUE report only all year
006Solids, total suspendedMO AVG <= 25 mg/L all year
006Solids, total suspendedDAILY MX <= 45 mg/L all year
006Nitrogen, ammonia total [as N]VALUE report only all year
006Carbon, tot organic [TOC]VALUE report only all year
006Hydrocarbons, total gas chromatographMO AVG report only all year
006Hydrocarbons, total gas chromatographDAILY MX <= 10 mg/L all year
006Flow, in conduit or thru treatment plantMO AVG report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006Chemical Oxygen Demand [COD]VALUE report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states