Portsmouth Naval Shipyard — NPDES permit ME0000868: limits, due date and EPA's record

Federal facility (Ship Building And Repairing), Kittery, Maine. NPDES permit ME0000868, in force until May 31, 2027. Last 12 months: no values over a limit, 3 of 36 reports late. Source: EPA ECHO, Oct 22, 2026.

Limits in force (21)

Parameter	Statistic	Limit	Months	Outfall
pH	minimum	≥ 6 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Solids, total suspended	monthly average	≤ 50 mg/L	all year	001
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	001
Oil and grease, hexane extr method	daily maximum	≤ 15 mg/L	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
pH	minimum	≥ 6 SU	all year	002
pH	maximum	≤ 9 SU	all year	002
Solids, total suspended	monthly average	≤ 50 mg/L	all year	002
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	002
Oil and grease, hexane extr method	daily maximum	≤ 15 mg/L	all year	002
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	002
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	002
pH	minimum	≥ 6 SU	all year	003
pH	maximum	≤ 9 SU	all year	003
Solids, total suspended	monthly average	≤ 50 mg/L	all year	003
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	003
Oil and grease, hexane extr method	daily maximum	≤ 15 mg/L	all year	003
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	003
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	003

Your permit document is the final word. As JSON: /api/v1/permits/ME0000868 · MCP: https://passage-data.com/mcp