# Air Quality Plan; Arizona; Agricultural Best Management Practices Rules for the West Pinal County PM10 Nonattainment Area

**Action Urgency Score:** 55/100

| Field | Value |
|---|---|
| Agency | Environmental Protection Agency |
| Type | Proposed rule |
| Action | Proposed rule. |
| Published | 2026-10-19 |
| Comments close | 2026-11-18 |
| Significant | No |
| CFR parts | 40 CFR 52 |
| Summary | The U.S. Environmental Protection Agency (EPA) is proposing to approve a revision to the Arizona Department of Environmental Quality (ADEQ or "State") portion of the Arizona State Implementation Plan (SIP). This revision concerns emissions of particulate matter (PM) that are 10 micrometers ([mu]m) or smaller in diameter (PM<INF>10</INF>) from agricultural crop and animal operations in the West Pinal County PM<INF>10</INF> nonattainment area. We are proposing to approve two local rules to regulate these emission sources under the Clean Air Act (CAA or "Act"). |
| Document number | 2026-21289 |

## Why this score
- Comment deadline within 30 days.

Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/10/19/2026-21289/air-quality-plan-arizona-agricultural-best-management-practices-rules-for-the-west-pinal-county-pm10). Last refreshed: 2026-11-04T09:17:43.641Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.