Ouro Mining, Inc - Bates Mine

NPDES permit AR0051900 · Minor NON-POTW · effective, expires 2028-04-30 · 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

5values over a limit
0required values missing, on 0 form(s)
11of 143 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, settleable (5).

Reporting

Reports are due about 25 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (84)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6 SU all year
001pHMINIMUM >= 6 SU all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 35 mg/L all year
001Solids, total suspendedMO AVG <= 35 mg/L all year
001Solids, total suspendedDAILY MX <= 70 mg/L all year
001Solids, total suspendedDAILY MX <= 70 mg/L all year
001Solids, settleableMO AVG report only all year
001Solids, settleableDAILY MX <= .5 mL/L all year
001Iron, total [as Fe]MO AVG <= 3.5 mg/L all year
001Iron, total [as Fe]MO AVG report only all year
001Iron, total [as Fe]MO AVG report only all year
001Iron, total [as Fe]DAILY MX <= 7 mg/L all year
001Iron, total [as Fe]DAILY MX report only all year
001Iron, total [as Fe]DAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
003pHMINIMUM >= 6 SU all year
003pHMINIMUM >= 6 SU all year
003pHMAXIMUM <= 9 SU all year
003pHMAXIMUM <= 9 SU all year
003Solids, settleableMO AVG report only all year
003Solids, settleableMO AVG report only all year
003Solids, settleableDAILY MX <= .5 mL/L all year
003Solids, settleableDAILY MX <= .5 mL/L all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
004pHMINIMUM >= 6 SU all year
004pHMINIMUM >= 6 SU all year
004pHMAXIMUM <= 9 SU all year
004pHMAXIMUM <= 9 SU all year
004Solids, settleableMO AVG report only all year
004Solids, settleableMO AVG report only all year
004Solids, settleableDAILY MX <= .5 mL/L all year
004Solids, settleableDAILY MX <= .5 mL/L all year
004Flow, in conduit or thru treatment plantMO AVG report only 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
004Flow, in conduit or thru treatment plantDAILY MX report only all year
005pHMINIMUM >= 6 SU all year
005pHMINIMUM >= 6 SU all year
005pHMAXIMUM <= 9 SU all year
005pHMAXIMUM <= 9 SU all year
005Solids, settleableMO AVG report only all year
005Solids, settleableMO AVG report only all year
005Solids, settleableDAILY MX <= .5 mL/L all year
005Solids, settleableDAILY MX <= .5 mL/L all year
005Flow, in conduit or thru treatment plantMO AVG report only 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
005Flow, in conduit or thru treatment plantDAILY MX report only all year
006pHMINIMUM >= 6 SU all year
006pHMINIMUM >= 6 SU all year
006pHMAXIMUM <= 9 SU all year
006pHMAXIMUM <= 9 SU all year
006Solids, settleableMO AVG report only all year
006Solids, settleableMO AVG report only all year
006Solids, settleableDAILY MX <= .5 mL/L all year
006Solids, settleableDAILY MX <= .5 mL/L all year
006Flow, in conduit or thru treatment plantMO AVG report only 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
006Flow, in conduit or thru treatment plantDAILY MX report only all year
007pHMINIMUM >= 6 SU all year
007pHMINIMUM >= 6 SU all year
007pHMAXIMUM <= 9 SU all year
007pHMAXIMUM <= 9 SU all year
007Solids, settleableMO AVG report only all year
007Solids, settleableMO AVG report only all year
007Solids, settleableDAILY MX <= .5 mL/L all year
007Solids, settleableDAILY MX <= .5 mL/L all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007Flow, in conduit or thru treatment plantDAILY MX 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