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United States Space Force - Cavalier SFS

Federal facility (Sewerage Systems), Cavalier Sfs, North Dakota. NPDES permit ND0023868, in force until Jun 30, 2031. Last 12 months: over a limit once (last December 2025), 3 required values missing, 1 of 2 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 32 days after each period: form A twice a year
Last report on file: June 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 2 reports late

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

Period ending	Parameter	Reported	Limit	Over by
December 2025	Solids, total suspended, monthly average	32 mg/L	≤ 30 mg/L	7%

Limits in force (14)

Parameter	Statistic	Limit	Months
BOD, 5-day, 20 deg. C	daily minimum	report only (mg/L)	all year
BOD, 5-day, 20 deg. C	monthly average	≤ 25 mg/L	all year
BOD, 5-day, 20 deg. C	daily maximum	≤ 45 mg/L	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	daily minimum	report only (mg/L)	all year
Solids, total suspended	monthly average	≤ 30 mg/L	all year
Solids, total suspended	daily maximum	≤ 45 mg/L	all year
Oil & Grease	daily minimum	report only (mg/L)	all year
Oil & Grease	average	report only (mg/L)	all year
Oil & Grease	daily maximum	≤ 10 mg/L	all year
Flow, total	total	report only (Mgal)	all year
Duration of discharge	total	report only (d)	all year
Oil and grease visual	value	report only (N=0;Y=1)	all year

How strict are these limits?

Oil & Grease, daily maximum 10 mg/L — stricter than 60% of 84 other minor federal facilities nationwide; 15% have the same limit
BOD, 5-day, 20 deg. C, monthly average 25 mg/L — stricter than 58% of 78 other minor federal facilities nationwide; 8% have the same limit
Solids, total suspended, daily maximum 45 mg/L — stricter than 27% of 147 other minor federal facilities nationwide; 30% have the same limit

Cited limits by parameter: North Dakota'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/ND0023868 · MCP: https://passage-data.com/mcp