Half a Pint an Hour: The Texas Threshold That Decides Whether Your Shop Registers
The short version. Texas does not have an optional air programme for body shops. Every shop needs authorisation, and for most the route is a permit by rule, not an individual permit. The number that decides whether you register at all is half a pint of paint in any one hour. The number that decides whether you need an enclosed filtered booth is two gallons of paint and solvent in any week. TCEQ states it can assess up to $10,000 for each day of violation.
None of this replaces the federal rule. A shop can be correctly authorised in Texas and still be in breach of EPA's 6H rule, because they are different regimes with different triggers.
The permit by rule, and which one
TCEQ's own guidance for auto body shops names the applicable authorisation:
PBR 106.436, which is written for repair and refinishing of motorcycles, passenger cars, light and heavy trucks, and other vehicle body parts, bodies, and cabs.
That sits in 30 TAC chapter 106, the permits-by-rule subchapter, and like every PBR it is subject to the general conditions of § 106.4 and the recordkeeping requirement of § 106.8. Two neighbouring rules cover work § 106.436 does not: § 106.433 for non-vehicle surface coating and stripping, and § 106.435 for classic and antique vehicle restoration only.
The half-pint threshold, and what it does not exempt
TCEQ:
you must use less than 1/2 pint or less of paint in any one hour of operation. This category was intended to allow shops that only do detail work and small touch-up jobs to operate without registering.
Read the second sentence. The exemption was written for detail and touch-up work. It is not a general small-shop exemption, and the measure is an hourly rate, not a monthly total. A shop that averages very little paint but sprays a full panel in an afternoon is not obviously inside it.
And what the threshold buys is relief from registering, not from complying. A shop under half a pint an hour still has to keep the records below.
The two-gallon threshold, and the booth
If your shop uses two gallons or more of paint and solvents in any week, you must have an enclosed, filtered paint booth or enclosed, filtered spray area.
Again the measure is a rate, weekly this time, and again it is paint and solvents together, not paint alone. Solvent used for cleaning counts toward the number that decides whether you need a booth.
The records, and how far back
TCEQ lists what to keep:
Safety Data Sheets (SDS) for your paints and solvents, solvent and paint purchase records, logs of your monthly paint and solvent usage, and the amount and types of waste generated at your site
and says an investigator expects records covering the last 2 years.
Three of those four are documents a shop already receives or generates. The one that is usually missing is the monthly usage log, because nothing else in the business produces it. It is also the record that proves which threshold you are under, which makes it the one an investigator asks for first.
Grandfathering is gone
The Texas Legislature eliminated "grandfathered" status as an option to avoid getting a permit or complying with a PBR.
If a shop's answer to "what is your air authorisation" is that it was operating before the rules, that answer stopped working.
The trap: state authorisation is not federal compliance
This is the claim most worth getting right, and it is the one most easily fudged.
30 TAC § 106.436 is a Texas rule. It authorises the emission. It does not carry the federal requirements.
40 CFR part 63 subpart HHHHHH, the 6H rule, applies independently. It has its own triggers, its own painter certification requirement, its own filter efficiency requirement and its own notification. A shop can hold a valid Texas PBR and be in violation of 6H, and the reverse is also true.
If you have not read the federal side, start with what the 6H rule actually requires.
What this page does not do
It does not generalise the numbers. Half a pint an hour and two gallons a week are Texas permit-by-rule thresholds. They are not national, and they are not a proxy for the federal trigger.
It does not read the rule text. Everything above is from TCEQ's own guidance page for auto body shops, which is the agency speaking about its own rules. The operative text sits in 30 TAC chapter 106 and RG-404 is TCEQ's longer guide to surface coating authorisation.
It says nothing about waste, water or reporting to other agencies. Air authorisation is one of several things a Texas shop is subject to.
Sources
- TCEQ, Answers for Environmental Questions from Auto Body Shops, tceq.texas.gov, read on 18 August 2026. Every quotation above is from that page.
- Supporting, cited but not quoted here: TCEQ RG-404, Surface Coating Facilities: A Guide for Obtaining Air Authorization, and the air permits by rule of 30 TAC chapter 106, subchapter S.
- The 6H rule: what it actually requires
- The methylene chloride paint stripper prohibition
- What Federal OSHA actually cites in body shops
General consumer information: not legal, insurance, or financial advice. Requirements, coverage, and practices vary by state, policy, and manufacturer.
Where this fits
Each link says what it is for. We add one only when a reader on this page has a real reason to need that page next.
- The 6H Rule at 18: Painter Certification, 98% Filters, and the Part That Went Electronic (the federal rule a Texas permit does not satisfy)
- The Methylene Chloride Deadline Passed in April. Here Is the Actual Rule. (the other federal prohibition that reaches a paint shop)
- 217 Citations, 53 Inspections: What Federal OSHA Actually Wrote Up in Body Shops (the inspection you are more likely to face than an air one)