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Rock Hill Quarries Company

Refuse Systems, St. Louis, Missouri. NPDES permit MO0138371, in force until Mar 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form Q quarterly (14 values), form A yearly
Renewal application due
Oct 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 5 reports late

Limits in force (23)

ParameterStatisticLimitMonths
Sulfate [as S]daily maximumreport only (mg/L)all year
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Oil and grease [soxhlet extr.] tot.daily maximumreport only (mg/L)all year
Arsenic, total recoverabledaily maximumreport only (ug/L)all year
Iron, total recoverabledaily maximumreport only (ug/L)all year
Selenium, total recoverabledaily maximumreport only (ug/L)all year
Nickel, total recoverabledaily maximumreport only (ug/L)all year
Silver total recoverabledaily maximumreport only (ug/L)all year
Zinc, total recoverabledaily maximumreport only (ug/L)all year
Aluminum, total recoverabledaily maximumreport only (ug/L)all year
Lead, total recoverabledaily maximumreport only (ug/L)all year
Copper, total recoverabledaily maximumreport only (ug/L)all year
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)all year
Antimony, total recoverabledaily maximumreport only (ug/L)all year
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year
Benzenedaily maximumreport only (ug/L)all year
Chloridedaily maximumreport only (mg/L)all year
Rainfalldaily maximumreport only (in)all year
Storm water flowdaily maximumreport only (MGD)all year
Chlorides + Sulfatesdaily maximumreport only (mg/L)all year

How strict are these limits?

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

Same industry: the 40 Refuse Systems permits in Missouri.

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MO0138371 · MCP: https://passage-data.com/mcp