Peabody Midwest Mining LLC Somerville Central Mine

NPDES permit ING040190 · Minor NON-POTW · effective, expires 2027-03-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

0values over a limit
0required values missing, on 0 form(s)
0of 32 forms filed late

Last period with anything received: 2026-07-31.

Reporting

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

Limits in force (24)

OutfallParameterStatisticLimitMonths
006pHDAILY MN >= 6 SU all year
006pHDAILY MX <= 9 SU all year
006Solids, total suspendedDAILY AV <= 35 mg/L all year
006Solids, total suspendedDAILY MX <= 70 mg/L all year
006Solids, settleableDAILY AV report only all year
006Solids, settleableDAILY MX <= .5 mL/L all year
006Iron, total [as Fe]DAILY AV <= 3 mg/L all year
006Iron, total [as Fe]DAILY MX <= 6 mg/L all year
006DurationMO TOTAL report only all year
006Flow, in conduit or thru treatment plantDAILY AV report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006Precipitation volumeMO TOTAL report only all year
044pHDAILY MN >= 6 SU all year
044pHDAILY MX <= 9 SU all year
044Solids, total suspendedDAILY AV <= 35 mg/L all year
044Solids, total suspendedDAILY MX <= 70 mg/L all year
044Solids, settleableDAILY AV report only all year
044Solids, settleableDAILY MX <= .5 mL/L all year
044Iron, total [as Fe]DAILY AV <= 3 mg/L all year
044Iron, total [as Fe]DAILY MX <= 6 mg/L all year
044DurationMO TOTAL report only all year
044Flow, in conduit or thru treatment plantDAILY AV report only all year
044Flow, in conduit or thru treatment plantDAILY MX report only all year
044Precipitation volumeMO TOTAL 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