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Callaway County Sewer District

Sewage treatment plant, Fulton, Missouri. NPDES permit MO0112224 expired Sep 30, 2024; its limits still apply. Last 12 months: over a limit 12 times (last June 2026), 1 of 3 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 28 days after each period: form Q quarterly (12 values)
Last report on file: June 2026
Oct 2024 – Sep 2025: 11 values over a limit, 0 required values missing, 0 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	4760	≤ 206 #/100mL	2211%
December 2025	E. coli, 7-day geometric mean	4760	≤ 1030 #/100mL	362%
December 2025	Nitrogen, ammonia total [as N], daily maximum	25.1	≤ 6.6 mg/L	280%
December 2025	Nitrogen, ammonia total [as N], monthly average	25.1	≤ 2.9 mg/L	766%
March 2026	Nitrogen, ammonia total [as N], daily maximum	23.3	≤ 6.6 mg/L	253%
March 2026	Nitrogen, ammonia total [as N], monthly average	23.3	≤ 2.9 mg/L	703%
March 2026	Solids, total suspended, monthly average	167	≤ 80 mg/L	109%
March 2026	Solids, total suspended, weekly average	167	≤ 120 mg/L	39%
June 2026	E. coli, 30-day geometric mean	260000	≤ 206 #/100mL	—
June 2026	E. coli, 7-day geometric mean	260000	≤ 1030 #/100mL	25143%
June 2026	Nitrogen, ammonia total [as N], daily maximum	6.4	≤ 3.6 mg/L	78%
June 2026	Nitrogen, ammonia total [as N], monthly average	6.4	≤ 1.4 mg/L	357%

Limits in force (14)

Parameter	Statistic	Limit	Months
BOD, 5-day, 20 deg. C	weekly average	≤ 65 mg/L	all year
BOD, 5-day, 20 deg. C	monthly average	≤ 45 mg/L	all year
pH	minimum	≥ 6.5 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	weekly average	≤ 120 mg/L	all year
Solids, total suspended	monthly average	≤ 80 mg/L	all year
Nitrogen, ammonia total [as N]	daily maximum	≤ 3.6 mg/L	Apr–Sep
Nitrogen, ammonia total [as N]	daily maximum	≤ 6.6 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	≤ 2.9 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	7-day geometric mean	≤ 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 3.6 mg/L — stricter than 92% of 545 other minor POTWs in Missouri; 3% have the same limit
Nitrogen, ammonia total [as N], monthly average 1.4 mg/L — stricter than 30% of 537 other minor POTWs in Missouri; 7% have the same limit
pH, minimum at least 6.5 SU — stricter than 12% of 634 other minor POTWs in Missouri; 87% have the same limit

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MO0112224 · MCP: https://passage-data.com/mcp