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Metro fitments • St. Louis

Paint Booth Filters for St. Louis Shops

MoDNR + St. Louis County Air-grade media plus NESHAP Subpart GG kits for the Boeing Defense supply chain

St. Louis is one of the most regulator-dense surface-coating markets in the Midwest. St. Louis County's Air Pollution Control Program is one of two delegated local authorities in Missouri (Kansas City is the other) and runs a more visible local presence than the rest of the state. The local economy is anchored by major industrial-coating populations: General Motors' Wentzville Assembly in St. Charles County, Boeing Defense, Space & Security's St. Louis campus (F-18, F-15, MQ-25, T-7A programs running aerospace coatings), Anheuser-Busch's St. Louis brewing and equipment finish footprint, the metro pharmaceutical cluster (Pfizer, Mallinckrodt), and the dense bi-state collision belt across St. Louis City, St. Louis County, St. Charles County, and the Illinois-side metro-east counties. We stock kits for all of these populations including Subpart GG aerospace.

Quick answer

St. Louis paint booths run under MoDNR, the Missouri Department of Natural Resources Air Pollution Control Program, under 10 CSR 10 air quality regulations, with the St. Louis County Department of Public Health Air Pollution Control Program operating a delegated local authority inside St. Louis County. Filter selection means matching the booth brand and model to a verified-fitment kit whose published capture efficiency satisfies both MoDNR and St. Louis County recordkeeping. Aerospace-finishing booths supporting the Boeing Defense supply chain may operate under federal NESHAP Subpart GG with HEPA-class final stages. The GM Wentzville OEM assembly footprint, Boeing Defense aerospace, Anheuser-Busch and pharma industrial finish, and Mississippi-corridor logistics define the local cycle.

By Ben Kurtz · Filter Fitment Lead, 20+ years in paint-booth service · Updated May 9, 2026
Find your MoDNR + St. Louis County + Subpart GG-ready filter kit

How St. Louis shops choose filters

MoDNR's Air Pollution Control Program writes the statewide framework for surface coating operations through 10 CSR 10 air quality regulations, with the St. Louis regional office handling permits and inspections for Missouri-side sources outside the delegated county. The St. Louis County Department of Public Health Air Pollution Control Program operates a delegated local authority inside the county with its own permitting paperwork, inspection cadence, and rules layered on top of the state framework. Cross-river operations on the Illinois side (St. Clair, Madison, Monroe counties) fall under Illinois EPA, a separate regulator. The 25-entry filter media taxonomy on this catalog covers the full range St. Louis shops actually run: 12 exhaust media classes from heavy-duty multi-stage stacks including aerospace 3-stage chromate stacks for Boeing Defense supplier work, down to lighter pleated panels for low-volume collision; 9 intake media classes including pressurized make-up air panels for aerospace cells; and 4 specialty types covering clearcoat-isolation, downdraft, HEPA-final aerospace, and waterborne-finish use cases.

Climate & replacement cycles

St. Louis runs on humid continental climate math with Ohio Valley moisture influence and a touch of subtropical-southern flavor in summer. Summers push relative humidity above 70 percent through extended stretches from June through August, sustained at higher levels than KC, compressing intake cycles roughly 25 to 30 percent against a temperate baseline. Winters bring sharp temperature swings, periodic ice events, and cold snaps that affect booth make-up air handling. The defining seasonal factor is severe weather: St. Louis sits in the central severe-weather corridor with significant hail and tornado events through April, May, June, and into July that drive collision volume into multi-week peaks. River flooding events (both Mississippi and Missouri) periodically affect the metro and can drive vehicle-damage collision spikes. Set subscriptions with pull-forward enabled for spring storm and flood seasons.

Regulatory landscape

Four regulatory authorities shape a St. Louis filter purchase. MoDNR's Air Pollution Control Program is the statewide authority under 10 CSR 10, the St. Louis regional office handles permits and inspections for Missouri-side sources outside St. Louis County (St. Charles County, Jefferson County, and St. Louis City fall outside the delegated county). The St. Louis County Department of Public Health Air Pollution Control Program operates a delegated local authority inside the county. Federal NESHAP Subpart GG applies to aerospace coating facilities, the Boeing Defense campus and supplier work involving chromated coatings carry Subpart GG obligations. Federal OSHA, Missouri operates as a federal-OSHA state for private employers, administers the spray finishing standard under 29 CFR 1910.107. Cross-river operations into Illinois fall under Illinois EPA. We tag every St. Louis order with the local authority and booth model so the audit trail writes itself.

Who buys filters in St. Louis

St. Louis filter demand splits across five populations. The first is OEM auto-assembly and supplier finish, GM Wentzville Assembly (St. Charles County) plus the deep automotive-supplier base scattered across the metro. The second is aerospace and defense finish, Boeing Defense, Space & Security's St. Louis campus running F-18, F-15, MQ-25, T-7A and other programs under NESHAP Subpart GG with 3-stage chromate filtration plus the regional supplier tier. The third is metro collision repair, the dense bi-state collision concentration across St. Louis City, St. Louis County, St. Charles County, and the Illinois metro-east. The fourth is industrial-coating finish, Anheuser-Busch brewing equipment, the pharmaceutical cluster, and the broader Mississippi-corridor industrial base. The fifth is heavy-truck and trailer finish tied to the I-70, I-44, I-55 freight economy.

Within Missouri

St. Louis filter FAQs

What's the difference between a MoDNR-compliant kit and a NESHAP Subpart GG kit?

A MoDNR-compliant kit (also satisfying St. Louis County Air Pollution Control inside the delegated county) is sized for the booth brand and model and ships with media whose published capture efficiency satisfies state and local surface-coating rules. A NESHAP Subpart GG kit is sized for an aerospace coating booth running 3-stage filtration with HEPA-class final stages and full chromium-capture documentation. The Subpart GG kit costs more per cycle and ships with capture-test data formatted for federal aerospace recordkeeping. The catalog separates them explicitly so you cannot accidentally put a collision-class kit in an aerospace booth.

How does St. Louis County Air Pollution Control work compared to MoDNR statewide?

St. Louis County operates a delegated local air-quality program inside the county — one of two delegated local programs in Missouri (Kansas City is the other). The underlying rules are MoDNR 10 CSR 10 plus county-specific layered requirements; permitting paperwork, inspections, and routine compliance contact for St. Louis County sources happen locally. Sources in St. Louis City, St. Charles County, or Jefferson County fall outside the delegated county and work directly with MoDNR's St. Louis regional office. The catalog tags orders by the appropriate authority.

My shop straddles the Missouri-Illinois state line — single account?

The catalog handles bi-state St. Louis accounts with separate ship-tos and metro tags on each delivery, so your Missouri-side booths invoice and document under MoDNR (or St. Louis County Air Pollution Control inside the delegated county) while your Illinois-side locations document under Illinois EPA. We tag every order with the regulator on file so the audit trail stays clean across both states.

How does Plains-edge severe weather affect my St. Louis subscription?

Severe weather across the metro generates weeks of unplanned collision volume. A storm system that hits St. Louis in April, May, or June can fill body-shop schedules for two to four weeks at compressed booth-hour-per-day, and filter cycles shorten accordingly. The cleanest posture is a subscription with pull-forward enabled — order an extra intake set the week a major storm hits and let the auto-cadence catch up afterward. The cart shows storm-season pull-forward as a one-click option for St. Louis-metro addresses.

Do you ship next-day to the St. Louis metro?

Standard shipping reaches the bi-state St. Louis metro in one to two business days from our regional warehouse network. Next-day is available on select kits to St. Louis, Clayton, Chesterfield, St. Charles, O'Fallon, Wentzville, Florissant, Kirkwood, Webster Groves, Maryland Heights, and the Illinois metro-east ZIP codes; the cart surfaces the option at checkout when your address qualifies. Aerospace-grade Subpart GG kits ship with engineering-spec documentation included and standard one-to-two-day delivery on most SKUs.

Are there filter differences between a Boeing Defense aerospace booth and a Wentzville GM-supplier booth?

Yes, substantially. Boeing Defense aerospace booths covered under Subpart GG run 3-stage filtration with HEPA-class final stages and capture-test documentation in every install record. GM Wentzville supplier booths run on OEM-program automotive-finish media tuned for the booth brand and the assembly-line cadence. The two kits are not interchangeable. The catalog separates them explicitly and the Filter Finder routes you to the correct family based on the booth nameplate and the coatings you spray.

Sources

Primary references cited on this page.

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Find your MoDNR + St. Louis County + Subpart GG-ready filter kit