City of Ravenwood — NPDES permit MO0021458: limits, due date and EPA's record

Sewage treatment plant, Ravenwood, Missouri. NPDES permit MO0021458 expired Dec 31, 2024; its limits still apply. Last 12 months: no values over a limit, 34 required values missing, 4 of 6 reports late. Source: EPA ECHO, Oct 22, 2026.

Limits in force (20)

Parameter	Statistic	Limit	Months	Outfall
BOD, 5-day, 20 deg. C	weekly average	≤ 65 mg/L	all year	001
BOD, 5-day, 20 deg. C	monthly average	≤ 45 mg/L	all year	001
pH	minimum	≥ 6.5 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Solids, total suspended	weekly average	≤ 120 mg/L	all year	001
Solids, total suspended	monthly average	≤ 80 mg/L	all year	001
Oil and grease [soxhlet extr.] tot.	daily maximum	≤ 15 mg/L	all year	001
Oil and grease [soxhlet extr.] tot.	monthly average	≤ 10 mg/L	all year	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 5.4 mg/L	Apr–Sep	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 11.3 mg/L	Jan, Feb, Mar, Oct, Nov, Dec	001
Nitrogen, ammonia total [as N]	monthly average	≤ 1.3 mg/L	Apr–Sep	001
Nitrogen, ammonia total [as N]	monthly average	≤ 2.6 mg/L	Jan, Feb, Mar, Oct, Nov, Dec	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	001
E. coli	7-day geometric mean	≤ 1030 #/100mL	Apr–Dec	001
E. coli	30-day geometric mean	≤ 206 #/100mL	Apr–Dec	001
BOD, 5-day, percent removal	monthly average minimum	≥ 65 %	all year	001
Solids, suspended percent removal	monthly average minimum	≥ 65 %	all year	001
BOD, 5-day, 20 deg. C	monthly average	report only (mg/L)	all year	INF
Solids, total suspended	monthly average	report only (mg/L)	all year	INF

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/MO0021458 · MCP: https://passage-data.com/mcp