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Relativity Space Inc

Federal facility (Guided Missiles And Space Vehicles), John C Stennis Space Center, Mississippi. NPDES permit MS0062677, in force until Jul 31, 2027. Last 12 months: over a limit 2 times (last December 2025), 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 28 days after each period: form A monthly (14 values)
Renewal application due: Feb 1, 2027 · 180 days before expiry; your permit may set another date
Last report on file: August 2026
Oct 2024 – Sep 2025: 1 value over a limit, 0 required values missing, 0 of 12 reports late

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

Period ending	Parameter	Reported	Limit
October 2025	pH, maximum	9.62 SU	≤ 9 SU
December 2025	pH, maximum	9.45 SU	≤ 9 SU

Limits in force (14)

Parameter	Statistic	Limit	Months
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Oil & Grease	monthly average	≤ 10 mg/L	all year
Oil & Grease	daily maximum	≤ 15 mg/L	all year
Iron, total recoverable	monthly average	report only (mg/L)	all year
Iron, total recoverable	daily maximum	report only (mg/L)	all year
Zinc, total recoverable	monthly average	report only (mg/L)	all year
Zinc, total recoverable	daily maximum	report only (mg/L)	all year
Aluminum, total recoverable	monthly average	report only (mg/L)	all year
Aluminum, total recoverable	daily maximum	report only (mg/L)	all year
Chlorine, total residual	monthly average	≤ .012 mg/L	all year
Chlorine, total residual	daily maximum	≤ .0208 mg/L	all year
Flow, total	monthly average	report only (MGD)	all year
Flow, total	daily maximum	report only (MGD)	all year

How strict are these limits?

Chlorine, total residual, monthly average .012 mg/L — stricter than 68% of 38 other minor federal facilities nationwide
Chlorine, total residual, daily maximum .0208 mg/L — stricter than 59% of 64 other minor federal facilities nationwide
Oil & Grease, monthly average 10 mg/L — stricter than 17% of 28 other minor federal facilities nationwide; 71% have the same limit

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

Same industry: the 4 Transportation Equipment permits in Mississippi.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MS0062677 · MCP: https://passage-data.com/mcp