| Applicability: |
eCFR Subpart Q  [ecfr.gov]
This subpart applies to:
- Industrial process cooling towers that are operated with chromium-based water treatment chemicals and are either Major Sources or located at Major Sources of HAPs*.
"Chromium-based water treatment chemicals" means any combination of chemicals containing chromium used to treat water.
*Major Sources of HAPs emit or have the potential to emit:
- ≥ 10 tons/year of any single HAP; or
- ≥ 25 tons/year of total HAPs.
- Area Sources emit less than Major Sources.
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| Rules apply to small, area sources? |
No |
| Known Sources in NDEE Jurisdiction: |
No
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| Date of Original Final Rule: |
9/8/94 |
| Amendments Dates: |
04/07/2006 |
| State Regulations (Title 129): |
Title 129, Chapter 13, Section 002.09
Previously: Chapter 28, Section 001.04.
Sources are also responsible for ensuring they are in compliance with current federal requirements found for this subpart in the CFR. |
| Federal Regulations: |
40 CFR 63.400 |
| Related Rules: |
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| Regulations and Federal Registers: |
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| Forms: |
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| Important Dates: |
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| FAQs, Fact Sheets, and Rule Summaries: |
(See attached file: 1Q - Overview.pdf)
(See attached file: 1Q - Compliance Checklist.pdf)
Texas CEQ - Rule Flowchart [tceq.texas.gov]
EPA's Subpart Q Website  [epa.gov] - Contains federal register notices
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| Presentations, Training and Articles: |
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| Other Information and Resources: |
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| Notes: |
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| Page Last Updated: |
12/7/22 |