Home/Industrial SWPPP

MSGP 2021 Expired Feb 28, 2026 — Administrative Continuance Active. Industrial facilities with prior coverage continue under the 2021 permit's terms. All inspection, SWPPP, benchmark monitoring, and DMR obligations remain in force while EPA finalizes the proposed 2026 MSGP.

Industrial SWPPP & MSGP Compliance — New Mexico Facilities Guide

Industrial stormwater is a separate compliance path from construction. If your facility stores materials, fuels, or equipment exposed to stormwater, you likely need a Stormwater Pollution Prevention Plan (SWPPP) under the EPA Multi-Sector General Permit (MSGP) — not the Construction General Permit (CGP). New Mexico does not administer the industrial program, so MSGP coverage runs through EPA directly. The 2021 MSGP expired February 28, 2026 and is on administrative continuance.

Construction vs. Industrial SWPPP at a Glance

The two NPDES stormwater programs require a SWPPP, but they cover different activities, run on different lifecycles, and carry different inspection and monitoring obligations. Treating one as a substitute for the other is a compliance failure with real enforcement exposure.

Dimension	Construction — CGP	Industrial — MSGP
Activity covered	Land-disturbing construction	Ongoing industrial operations
Permit	CGP — NMR100000 (NM)	MSGP 2021 (federal EPA)
Trigger	1+ acre disturbance	Facility in a covered industrial sector
SWPPP lifespan	Project duration → NOT	Facility lifespan, reviewed annually
Routine inspections	Every 14 days	Quarterly visual observations
Stormwater sampling	Not required (visual)	Sector-specific benchmark monitoring
Pollution Prevention Team	Not required	Required — named team members
Closeout	File NOT at final stabilization	Renew every 5-year permit term

See the full breakdown on CGP vs. MSGP.

Industrial SWPPP Deep-Dive Pages

MSGP Industrial Permit

11 NM industrial sectors, administrative continuance, and IPLLC compliance services.

CGP vs. MSGP

Which SWPPP permit your project needs — and when you need both.

Proposed 2026 MSGP Changes

PFAS monitoring, quarterly benchmarks, climate resilience, and new visual discharge standard.

Benchmark Monitoring

Sector-specific sampling, Tier 1/Tier 2 corrective action, and NeT-MSGP reporting.

Dual Permit & SPCC

When a facility needs CGP + MSGP simultaneously, plus the SPCC oil-storage threshold.

Does Your Facility Need an Industrial SWPPP?

The MSGP applies to facilities that discharge stormwater associated with industrial activity through a point source to a water of the United States. If any of the following describe your operation, an MSGP applicability review is warranted:

Outdoor storage of raw materials, products, byproducts, or process residuals exposed to rain or snowmelt

Vehicle or equipment fueling, maintenance, washing, or storage areas open to stormwater

Loading/unloading of materials at docks or transfer points outdoors

Aggregate, concrete, asphalt, mining, metals, oil/gas support, hazardous waste, or power generation activity

Material handling residue, significant dust, or particulate matter that can be carried offsite by runoff

What Industrial Operators Should Do Now

Confirm your administrative continuance status in EPA's NPDES eReporting (NeT-MSGP) — continuance only protects facilities covered before Feb 28, 2026

Do not reduce compliance activity — quarterly visual observations, annual comprehensive evaluations, benchmark sampling, and DMRs all continue

Update your SWPPP to reflect current facility conditions; an outdated SWPPP under an active inspection is a violation waiting to happen

Budget for confirmed 2026 MSGP cost-drivers — PFAS monitoring, increased benchmark frequency, and climate-resilience documentation

Determine whether co-located construction triggers a separate CGP NMR100000 SWPPP

Contact Inspections Plus for an MSGP applicability and SWPPP readiness review

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Frequently Asked Questions

What is an industrial SWPPP and how is it different from a construction SWPPP?

An industrial SWPPP is required under the EPA Multi-Sector General Permit (MSGP) and addresses ongoing industrial activities with permanent stormwater exposure — material storage areas, vehicle maintenance, loading docks, and fuel storage. A construction SWPPP under CGP NMR100000 addresses temporary BMPs for earthmoving and expires when you file a Notice of Termination. The industrial SWPPP is a long-term document reviewed and recertified at least annually, and it includes a Pollution Prevention Team, drainage area characterization, and benchmark monitoring that construction SWPPPs do not.

Does New Mexico administer the industrial MSGP program?

No. New Mexico operates a delegated NPDES program for construction stormwater but does not have delegation for the industrial MSGP sector. Industrial stormwater from facility operations is covered under the federal EPA MSGP directly (EPA Region 6). Construction activity disturbing 1+ acres at that same facility requires separate CGP NMR100000 coverage. Many NM industrial facilities need both permits at once.

The MSGP 2021 expired in February 2026 — are facilities still covered?

Yes, if they had active coverage at expiration. The 2021 MSGP expired February 28, 2026 and is operating under administrative continuance under 40 CFR 122.6. Facilities that held valid coverage continue under the expired permit's terms — all inspection, SWPPP, monitoring, and reporting obligations remain fully in effect — until EPA issues the proposed 2026 MSGP. Facilities that did NOT have coverage before expiration cannot obtain coverage under the continued permit and are unpermitted dischargers until the new MSGP issues.

Which New Mexico industries typically need MSGP coverage?

Common NM sectors include ready-mix concrete and aggregate operations, asphalt plants (Sector D), metal fabricators and scrap yards (Sector F), active mining and processing (Sectors G/H/J), oil and gas support facilities in the Permian and San Juan basins (Sector I), hazardous waste treatment (Sector K), and steam electric power generation (Sector AD). If your facility stores materials, fuels, or equipment exposed to stormwater, an MSGP applicability review is warranted.

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