# Arizona Public Service Steam Electric Station (Four Corners Power Plant)
> **Judicial** · FY2011 · — · —
## Case
- **Activity ID:** `2600020355`
- **Case Number:** 09-2011-0501
- **Type:** Judicial
- **Lead:** EPA
- **Outcome:** —
- **Penalty assessed:** —
- **Cost recovery:** —
- **Compliance action $:** —
- **Multimedia (multi-env):** —
## Defendants
- Arizona Public Service (4 Corners) (complaint) (settlement)
## Summary

U.S. EPA reached a Clean Air Act settlement with several Arizona and New Mexico-based utility companies to install pollution control technology to reduce harmful air pollution from the Four Corners Power Plant located on the Navajo Nation near Shiprock, New Mexico. The settlement requires an estimated $160 million in upgrades to the plant's sulfur dioxide (SO2) and nitrogen oxide (NOx) pollution controls. The settlement also requires $6.7 million to be spent on three health and environmental mitigation projects for tribal members and payment of a $1.5 million civil penalty. The $6.7 million of mitigation funds includes $2 million to establish a Health Care Project trust fund to pay for certain medical expenses for people living on the Navajo Nation near the Four Corners Power Plant, who require respiratory health care. EPA expects that the actions required by the settlement will reduce harmful emissions by approximately 5,540 tons (11 million+ pounds) per year. Arizona Public Service Company (APS) is the operator and primary owner of the Four Corners Plant. El Paso Electric Company, Public Service Company of New Mexico, Salt River Project Agricultural Improvement and Power District and Tucson Electric Power Company are current co-owners of the plant and Southern California Edison Company is a former co-owner of the plant. The settlement resolves claims that the companies violated the New Source Review provisions of the federal Clean Air Act by unlawfully modifying the Four Co

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*Source: [EPA ECHO](https://echo.epa.gov/) · AI Analytics · CC0 1.0*