Shell Rock Not-for-Profit Water & Sewer — NPDES permit MO0135828: limits, due date and EPA's record

Civic And Social Associations, Shell Knob, Missouri. NPDES permit MO0135828, in force until Apr 30, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (22)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	daily minimum	report only (mg/L)	all year
Oxygen, dissolved [DO]	monthly average minimum	report only (mg/L)	all year
BOD, 5-day, 20 deg. C	weekly average	≤ 30 mg/L	all year
BOD, 5-day, 20 deg. C	monthly average	≤ 20 mg/L	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	weekly average	≤ 30 mg/L	all year
Solids, total suspended	monthly average	≤ 20 mg/L	all year
Nitrogen, ammonia total [as N]	daily maximum	≤ 9.3 mg/L	Apr–Sep
Nitrogen, ammonia total [as N]	daily maximum	≤ 12.1 mg/L	Jan, Feb, Mar, Oct, Nov, Dec
Nitrogen, ammonia total [as N]	monthly average	≤ 3.5 mg/L	Apr–Sep
Nitrogen, ammonia total [as N]	monthly average	≤ 4.6 mg/L	Jan, Feb, Mar, Oct, Nov, Dec
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year
Phosphorus, total [as P]	monthly average	≤ .5 mg/L	all year
Aluminum, total recoverable	daily maximum	≤ 748.73 ug/L	all year
Aluminum, total recoverable	monthly average	≤ 373.16 ug/L	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year
Chlorine, total residual	daily maximum	≤ 19 ug/L	all year
Chlorine, total residual	monthly average	≤ 9.5 ug/L	all year
E. coli	daily maximum	≤ 630 #/100mL	Apr–Dec
E. coli	30-day geometric mean	≤ 126 #/100mL	Apr–Dec

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/MO0135828 · MCP: https://passage-data.com/mcp