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Commonwealth of Northern Mariana Islands - Department of Public Lands

Sewage treatment plant, Northern Mariana Islands, Commonwealth Of The, the Northern Mariana Islands. NPDES permit MP0020371, in force until Aug 31, 2030. Last 12 months: over a limit 16 times (last March 2026), 126 required values missing, 7 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due

About 28 days after each period: outfall 001 form A quarterly (58 values), outfall 001 form Q quarterly (24 values), outfall STN1 form RW quarterly (10 values), outfall STN2 form RW quarterly (10 values), outfall STN3 form RW quarterly (10 values), outfall 001 form Y yearly

Last report on file

March 2026

Oct 2024 – Sep 2025

13 values over a limit, 15 required values missing, 20 of 39 reports late

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

Limits in force (124)

How strict are these limits?

• Cyanide, total [as CN], monthly average 1 ug/L — stricter than 100% of 22 other minor POTWs nationwide
• Cyanide, total [as CN], daily maximum 1 ug/L — stricter than 100% of 35 other minor POTWs nationwide
• pH, minimum at least 7.6 SU — stricter than 99% of 4,256 other minor POTWs nationwide

Cited limits by parameter: we hold no rule of the Northern Mariana Islands's own; the federal ones.

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MP0020371 · MCP: https://passage-data.com/mcp