Passage Data · Check a report · Use it from your AI

Six Flags St. Louis LLC

Amusement Parks, Eureka, Missouri. NPDES permit MO0105473 expired Jun 30, 2023; its limits still apply. Last 12 months: over a limit 7 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (16 values), outfall 002 form A monthly (16 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
9 values over a limit, 0 required values missing, 0 of 24 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingOutfallParameterReportedLimit
October 2025002pH, maximum9.74≤ 9 SU
November 2025002pH, maximum9.09≤ 9 SU
December 2025001pH, maximum9.31≤ 9 SU
December 2025002pH, maximum9.26≤ 9 SU
April 2026002pH, maximum9.14≤ 9 SU
May 2026001pH, maximum9.26≤ 9 SU
May 2026002pH, maximum9.62≤ 9 SU

Limits in force (32)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily minimumreport only (mg/L)all year001
Oxygen, dissolved [DO]monthly average minimumreport only (mg/L)all year001
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year001
Oxygen demand, chem. [high level] [COD]monthly averagereport only (mg/L)all year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendeddaily maximum≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Oil and grease [soxhlet extr.] tot.daily maximum≤ 15 mg/Lall year001
Oil and grease [soxhlet extr.] tot.monthly average≤ 10 mg/Lall year001
Benzenedaily maximumreport only (ug/L)all year001
Benzenemonthly averagereport only (ug/L)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Chlorine, total residualdaily maximum≤ 17 ug/Lall year001
Chlorine, total residualmonthly average≤ 8 ug/Lall year001
Oxygen, dissolved [DO]daily minimumreport only (mg/L)all year002
Oxygen, dissolved [DO]monthly average minimumreport only (mg/L)all year002
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year002
Oxygen demand, chem. [high level] [COD]monthly averagereport only (mg/L)all year002
pHminimum≥ 6.5 SUall year002
pHmaximum≤ 9 SUall year002
Solids, total suspendeddaily maximum≤ 45 mg/Lall year002
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Oil and grease [soxhlet extr.] tot.daily maximum≤ 15 mg/Lall year002
Oil and grease [soxhlet extr.] tot.monthly average≤ 10 mg/Lall year002
Benzenedaily maximumreport only (ug/L)all year002
Benzenemonthly averagereport only (ug/L)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Chlorine, total residualdaily maximum≤ 17 ug/Lall year002
Chlorine, total residualmonthly average≤ 8 ug/Lall year002

How strict are these limits?

Cited limits by parameter: Missouri's rules and the federal ones.

Same industry: the 21 Amusement and Recreation Services permits in Missouri.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MO0105473 · MCP: https://passage-data.com/mcp