Martin Marietta Materials, Inc.

NPDES permit WY0034266 · Minor NON-POTW · effective, expires 2030-10-31 · 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 10 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 WY permits in EPA's filings — check your permit).

Limits in force (26)

OutfallParameterStatisticLimitMonths
003pHINST MIN >= 6.5 SU all year
003pHINST MIN >= 6.5 SU all year
003pHINST MAX <= 9 SU all year
003pHINST MAX <= 9 SU all year
003Solids, total suspendedWKLY AVG <= 45 mg/L all year
003Solids, total suspendedWKLY AVG <= 45 mg/L all year
003Solids, total suspendedMO AVG <= 30 mg/L all year
003Solids, total suspendedMO AVG <= 30 mg/L all year
003Solids, total suspendedDAILY MX report only all year
003Solids, total suspendedDAILY MX report only all year
003Nitrogen, ammonia total [as N]MO AVG <= 2.21 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
003Nitrogen, ammonia total [as N]MO AVG <= 2.21 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
003Nitrogen, ammonia total [as N]MO AVG <= 1.71 mg/L May, Jun, Jul, Aug, Sep
003Nitrogen, ammonia total [as N]MO AVG <= 1.71 mg/L May, Jun, Jul, Aug, Sep
003Nitrogen, ammonia total [as N]DAILY MX <= 5.62 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
003Nitrogen, ammonia total [as N]DAILY MX <= 5.62 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
003Nitrogen, ammonia total [as N]DAILY MX <= 5.62 mg/L May, Jun, Jul, Aug, Sep
003Nitrogen, ammonia total [as N]DAILY MX <= 5.62 mg/L May, Jun, Jul, Aug, Sep
003DurationMO TOTAL report only all year
003DurationMO TOTAL report only all year
003FlowMO AVG report only all year
003FlowMO AVG report only all year
003FlowDAILY MX report only all year
003FlowDAILY MX report only all year
003Produced water, oil and greaseDAILY MX <= 10 mg/L all year
003Produced water, oil and greaseDAILY MX <= 10 mg/L 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