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Southern Hills Estates HOA

Civic And Social Associations, Dexter, Missouri. NPDES permit MO0132586 expired Jun 30, 2023; its limits still apply. Last 12 months: over a limit 8 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due: About 28 days after each period: form A quarterly (12 values)
Last report on file: June 2026
Oct 2024 – Sep 2025: 16 values over a limit, 0 required values missing, 2 of 4 reports late

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

Period ending	Parameter	Reported	Limit	Over by
December 2025	E. coli, 30-day geometric mean	2420	≤ 206 #/100mL	1075%
December 2025	E. coli, daily maximum	2420	≤ 1030 #/100mL	135%
December 2025	Nitrogen, ammonia total [as N], monthly average	8.01	≤ 2.8 mg/L	186%
March 2026	Nitrogen, ammonia total [as N], monthly average	3.72	≤ 2.8 mg/L	33%
June 2026	E. coli, 30-day geometric mean	2420	≤ 206 #/100mL	1075%
June 2026	E. coli, daily maximum	2420	≤ 1030 #/100mL	135%
June 2026	Nitrogen, ammonia total [as N], daily maximum	11.5	≤ 4.3 mg/L	167%
June 2026	Nitrogen, ammonia total [as N], monthly average	11.5	≤ 1.4 mg/L	721%

Limits in force (14)

Parameter	Statistic	Limit	Months
BOD, 5-day, 20 deg. C	weekly average	≤ 45 mg/L	all year
BOD, 5-day, 20 deg. C	monthly average	≤ 30 mg/L	all year
pH	minimum	≥ 6.5 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	weekly average	≤ 45 mg/L	all year
Solids, total suspended	monthly average	≤ 30 mg/L	all year
Nitrogen, ammonia total [as N]	daily maximum	≤ 4.3 mg/L	Apr–Sep
Nitrogen, ammonia total [as N]	daily maximum	≤ 8.6 mg/L	Jan, Feb, Mar, Oct, Nov, Dec
Nitrogen, ammonia total [as N]	monthly average	≤ 1.4 mg/L	Apr–Sep
Nitrogen, ammonia total [as N]	monthly average	≤ 2.8 mg/L	Jan, Feb, Mar, Oct, Nov, Dec
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
E. coli	daily maximum	≤ 1030 #/100mL	Apr–Dec
E. coli	30-day geometric mean	≤ 206 #/100mL	Apr–Dec

How strict are these limits?

Nitrogen, ammonia total [as N], daily maximum 4.3 mg/L — stricter than 77% of 758 other minor industrial and other permits in Missouri
Nitrogen, ammonia total [as N], monthly average 1.4 mg/L — stricter than 41% of 753 other minor industrial and other permits in Missouri; 17% have the same limit
BOD, 5-day, 20 deg. C, weekly average 45 mg/L — stricter than 27% of 787 other minor industrial and other permits in Missouri; 31% have the same limit

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

Same industry: the 212 Membership Organizations permits in Missouri.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MO0132586 · MCP: https://passage-data.com/mcp