Six Flags St. Louis LLC

NPDES permit MO0105473 · Minor NON-POTW · expired, expires 2023-06-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2023-06-30 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

8values over a limit
0required values missing, on 0 form(s)
0of 22 forms filed late

Last period with anything received: 2026-07-31. Most often over: pH (8).

Reporting

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

Limits in force (32)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN report only all year
001Oxygen, dissolved [DO]MO AV MN report only all year
001Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
001Oxygen demand, chem. [high level] [COD]MO AVG report only all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Oil and grease [soxhlet extr.] tot.DAILY MX <= 15 mg/L all year
001Oil and grease [soxhlet extr.] tot.MO AVG <= 10 mg/L all year
001BenzeneDAILY MX report only all year
001BenzeneMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Chlorine, total residualDAILY MX <= 17 ug/L all year
001Chlorine, total residualMO AVG <= 8 ug/L all year
002Oxygen, dissolved [DO]DAILY MN report only all year
002Oxygen, dissolved [DO]MO AV MN report only all year
002Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
002Oxygen demand, chem. [high level] [COD]MO AVG report only all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedDAILY MX <= 45 mg/L all year
002Solids, total suspendedMO AVG <= 30 mg/L all year
002Oil and grease [soxhlet extr.] tot.DAILY MX <= 15 mg/L all year
002Oil and grease [soxhlet extr.] tot.MO AVG <= 10 mg/L all year
002BenzeneDAILY MX report only all year
002BenzeneMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Chlorine, total residualDAILY MX <= 17 ug/L all year
002Chlorine, total residualMO AVG <= 8 ug/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