Mountain Cement Company LLC

NPDES permit WY0097037 · Minor NON-POTW · effective, expires 2031-06-30 · 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

EPA's file shows no filings for this permit in this window. That is a statement about the file, not about the facility.

Reporting

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

Limits in force (29)

OutfallParameterStatisticLimitMonths
001Specific conductanceDAILY MX report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
001pHINST MIN >= 6.5 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Calcium, dissolved [as Ca]DAILY MX report only all year
001Magnesium, dissolved [as Mg]DAILY MX report only all year
001Sodium, dissolved [as Na]DAILY MX report only all year
001Sodium adsorption ratioDAILY MX report only all year
001DurationMO TOTAL report only all year
001DurationMO TOTAL report only all year
001Nitrogen, Ammonia TotalDAILY MX <= 5.5 mg/L all year
001Solids, total dissolvedDAILY MX <= 5000 mg/L all year
001FlowMO AVG report only all year
001FlowMO AVG report only all year
001FlowDAILY MX report only all year
001FlowDAILY MX report only all year
001SulfateDAILY MX <= 2000 mg/L all year
001Produced water, oil and greaseDAILY MX <= 10 mg/L all year
IR01Priority pollutants scan [yes/no]VALUE report only all year
IR01Priority pollutants scan [yes/no]VALUE report only all year
IR02Priority pollutants scan [yes/no]VALUE report only all year
IR02Priority pollutants scan [yes/no]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