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Medium urgency

New Mexico Statewide Municipal Separate Storm Sewer System (MS4) General Permit Proposal

Detected July 29, 2026 · in Environmental & Emissions Compliance (EPA)

EPA Region 6 proposes a new NPDES statewide general permit for stormwater discharges from MS4s in New Mexico, replacing the existing permit.

Aforeworn detected this change in the Environmental & Emissions Compliance (EPA) space on July 29, 2026 and published this briefing so affected operators are forewarned rather than caught off guard. It is rated Medium urgency. All municipal separate storm sewer system operators in New Mexico, including municipalities, counties, and other entities with MS4s. should confirm how it applies to their specific situation before acting. There is a time constraint attached: Comments due by April 3, 2026 (30 days after publication on March 4, 2026).. Acting after that point can mean penalties, a lapsed licence, or lost eligibility — exactly the kind of surprise Aforeworn exists to prevent. Aforeworn monitors Environmental & Emissions Compliance (EPA) continuously and turns every detected change into a plain-English briefing like this one, so you always know first. Forewarned is forearmed.

What changed

Proposed new general permit for stormwater discharges from MS4s, with updated requirements for stormwater management, monitoring, and reporting.

Who it affects

All municipal separate storm sewer system operators in New Mexico, including municipalities, counties, and other entities with MS4s.

What you must do

Review the proposed permit and submit comments by the deadline; prepare for compliance with new permit terms if finalized.

Deadline

Comments due by April 3, 2026 (30 days after publication on March 4, 2026).

Source: https://www.federalregister.gov/documents/2026/03/04/2026-04322/new-mexico-statewide-municipal-separate-storm-sewer-system-ms4-general-permit-proposal

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