Holcim (US) Inc.

NPDES permit MD0002151 · Minor NON-POTW · effective, expires 2028-02-29 · 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 60 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 MD permits in EPA's filings — check your permit).

Limits in force (55)

OutfallParameterStatisticLimitMonths
003Temperature, water deg. fahrenheitDAILY MX report only Jun, Jul, Aug, Sep
003Temperature, water deg. fahrenheitDAILY MX report only Jun, Jul, Aug, Sep
003pHMINIMUM >= 6.5 SU all year
003pHMAXIMUM <= 8.5 SU all year
003Temp. diff. between up/down stream deg. FDAILY MX <= 0 deg F Jun, Jul, Aug, Sep
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
004pHMINIMUM >= 6.5 SU all year
004pHMAXIMUM <= 8.5 SU all year
004Solids, total suspendedMO AVG <= 15 mg/L all year
004Solids, total suspendedDAILY MX <= 31 mg/L all year
004Solids, total suspendedMO AVG <= 538 lb/d all year
004Solids, total suspendedDAILY MX <= 1112 lb/d all year
004Solids, settleableDAILY MX <= .5 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
005Temperature, water deg. fahrenheitDAILY MX <= 0 deg F Jun, Jul, Aug, Sep
005Temperature, water deg. fahrenheitDAILY MX report only Jun, Jul, Aug, Sep
005Temperature, water deg. fahrenheitDAILY MX report only Jun, Jul, Aug, Sep
005pHMINIMUM >= 6.5 SU all year
005pHMAXIMUM <= 8.5 SU 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
006Temperature, water deg. fahrenheitDAILY MX <= 0 deg F Jun, Jul, Aug, Sep
006Temperature, water deg. fahrenheitDAILY MX report only Jun, Jul, Aug, Sep
006Temperature, water deg. fahrenheitDAILY MX report only Jun, Jul, Aug, Sep
006pHMINIMUM >= 6.5 SU all year
006pHMAXIMUM <= 8.5 SU 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
008pHMINIMUM >= 6 SU all year
008pHMAXIMUM <= 8.5 SU all year
008Solids, total suspendedMO AVG <= 15 mg/L all year
008Solids, total suspendedDAILY MX <= 31 mg/L all year
008Solids, total suspendedMO AVG <= 538 lb/d all year
008Solids, total suspendedDAILY MX <= 1112 lb/d all year
008Solids, settleableDAILY MX <= .5 mg/L all year
008Flow, in conduit or thru treatment plantMO AVG report only all year
008Flow, in conduit or thru treatment plantDAILY MX report only all year
010Oxygen, dissolved [DO]INST MIN >= 5 mg/L all year
010BOD, 5-day, 20 deg. CMX MO AV <= 30 mg/L all year
010BOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
010BOD, 5-day, 20 deg. CMX MO AV <= .5 lb/d all year
010BOD, 5-day, 20 deg. CDAILY MX <= .75 lb/d all year
010pHMINIMUM >= 6.5 SU all year
010pHMAXIMUM <= 8.5 SU all year
010Solids, total suspendedMX MO AV <= 30 mg/L all year
010Solids, total suspendedDAILY MX <= 45 mg/L all year
010Solids, total suspendedMX MO AV <= .5 lb/d all year
010Solids, total suspendedDAILY MX <= .75 lb/d all year
010Flow, in conduit or thru treatment plantMO AVG report only all year
010Flow, in conduit or thru treatment plantDAILY MX report only all year
010Chlorine, total residualMO AVG <= .1 mg/L all year
010Chlorine, total residualDAILY MX <= .1 mg/L all year
010E. coliMO GEOMN <= 126 MPN/100mL 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