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Los Alamos County - Bayo WWTP

Sewage treatment plant, major discharger, Los Alamos, New Mexico. NPDES permit NM0020141, in force until Sep 30, 2027. Last 12 months: over a limit once (last April 2026), 21 required values missing, 10 of 21 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due

About 15 days after each period: outfall 001 form A monthly (24 values), outfall 001 form Q quarterly (1 value), outfall 001 form S twice a year (2 values), outfall 001 form T every 60 months, outfall TX1 form S twice a year, outfall TX1 form Y yearly

Renewal application due

Apr 3, 2027 · 180 days before expiry; your permit may set another date

Last report on file

September 2026

Oct 2024 – Sep 2025

6 values over a limit, 0 required values missing, 2 of 21 reports late

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

Limits in force (43)

How strict are these limits?

• Copper, total [as Cu], daily maximum 16.85 ug/L — stricter than 68% of 140 other major POTWs nationwide
• Oxygen, dissolved [DO], monthly minimum at least 5 mg/L — stricter than 41% of 581 other major POTWs nationwide; 15% have the same limit
• Chlorine, total residual, instantaneous maximum 11 ug/L — stricter than 13% of 22 other major POTWs in New Mexico; 77% have the same limit

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

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NM0020141 · MCP: https://passage-data.com/mcp