U.S. EPA Pacific Southwest Region

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U.S. EPA Pacific Southwest Region The official page of U.S. EPA Region 9,
serving Arizona, California, Hawaii, Nevada, the Pacific Islands, and 148 Tribal Nations.

10/29/2026

📍Richmond, CA

: EPA recently released a proposed cleanup plan for the Superfund Site, located in Richmond on the San Francisco Bay. 🌊

📄 The plan addresses remaining contamination in the Lauritzen Channel and includes dredging polluted sediment, capping in limited areas, and measures to help prevent further contamination of the channel. 👍

💬 Have feedback? We want to hear from you! Submit comments by Dec. 29, 2026.

Check out our video 📽️ for background on the site and learn how to offer comment here: https://cumulis.epa.gov/supercpad/cursites/csitinfo.cfm?id=0902440

Department of Toxic Substances Control (DTSC)

🔬💧 Big news for clean water in  ! U.S. Environmental Protection Agency has approved the American Samoa Environmental Pro...
10/28/2026

🔬💧 Big news for clean water in !

U.S. Environmental Protection Agency has approved the American Samoa Environmental Protection Agency laboratory to conduct microbiological testing of drinking water.

After a comprehensive 3-day on-site evaluation by U.S. EPA Pacific Southwest Region staff, the lab is ready to deliver quicker results for routine sampling of drinking water, village water systems, and water vending machines. 🙌

This is cooperative federalism in action—EPA empowering local regulators to protect public health and keep communities safe. 🤝🌺

To learn more, visit: https://www.asepa.gov/post/asepa-water-laboratory-receives-full-u-s-epacertification-for-drinking-water-microbiological-analys

🌊🤝 Big milestone for Tribal water protection! EPA has approved the Navajo Nation’s application for treatment in a simila...
10/27/2026

🌊🤝 Big milestone for Tribal water protection! EPA has approved the Navajo Nation’s application for treatment in a similar manner as a state (TAS) under the Clean Water Act, marking an important step forward for tribal sovereignty and water protection.

This makes the Navajo Nation the first Tribe in the U.S. eligible to issue and oversee permits for pollutant discharges into tribal waters and manage sewage sludge programs on its lands.💧🌎

EPA is proud to support tribal self-governance and work alongside the Navajo Nation on next steps. 🙌

To learn more, visit: https://www.epa.gov/newsreleases/navajo-nation-becomes-first-tribe-eligible-administer-clean-water-act-permitting

To celebrate the   here in the Pacific Southwest, we’re highlighting big progress on the Argonaut Mine cleanup, starting...
10/26/2026

To celebrate the here in the Pacific Southwest, we’re highlighting big progress on the Argonaut Mine cleanup, starting this fall! ⚒️

EPA recently hosted a site tour with local, state, and federal partners to mark the start of cleanup work that will address arsenic, lead, and mercury contamination at 35 residential properties in the City of Jackson- California.

U.S. Army Corps of Engineers, Sacramento District, let’s get to work! 💪

➡️ Swipe through and visit: https://cumulis.epa.gov/supercpad/cursites/csitinfo.cfm?id=0904596 to learn more.

USACE South Pacific Division | Department of Toxic Substances Control (DTSC)

This summer, EPA visited   to support local environmental capacity-building 💪 through training and technical assistance ...
10/19/2026

This summer, EPA visited to support local environmental capacity-building 💪 through training and technical assistance 🛠️ with the American Samoa Environmental Protection Agency (AS-EPA).

During these visits, EPA staff visited multiple sites in American Samoa including drinking water and wastewater treatment facilities, water infrastructure construction sites, and industrial facilities 🏗️ to provide hands-on technical assistance 🤝 and training to AS-EPA and industrial partners. 🎯 The goal: strengthen understanding of the and the National Pollutant Discharge Elimination System ( ) Permitting Program under the . 🚰

EPA staff also provided training on the State Response Program and visited the landfill — a site assessed under American Samoa’s Brownfield Assessment Grant and scheduled for cleanup using federal funds. 🌱

American Samoa Government | Office of the Governor - American Samoa

10/16/2026

From a vacant brownfield to a new gateway connecting Sacramento communities. 🚉

EPA recently joined Sacramento Housing and Redevelopment Agency, Sacramento Regional Transit District to celebrate the ribbon cutting for the new Dos Rios Light Rail Station. Once a vacant, contaminated eyesore -- or brownfield -- the site has been transformed into a new transit hub connecting the River District and Mirasol Village to jobs, services, and opportunities throughout .

An EPA Brownfields Cleanup Grant and a subgrant from Sacramento’s EPA Brownfields Revolving Loan helped clean up the property and prepare it for reuse. These investments helped turn polluted land into infrastructure that will serve the communities for years to come.

🌱Clean land. 🚉Better connections. 🏘️Healthier communities.

10/15/2026

Happy Children’s Health Month America! From reducing exposure to lead and PFAS, to improving air and water quality in local communities, the Trump EPA this October is highlighting OVER 100 ACTIONS we have taken to keep our nation’s children safe and Make America Healthy Again. Read more about our efforts to safeguard human health and the environment for our nation’s future generations here: https://www.epa.gov/newsreleases/trump-epa-celebrates-childrens-health-month-100-actions-protect-nations-most-precious

⛏️ Cleanup complete at the Mesa V Mine Complex on the Navajo Nation!EPA and our contractors have completed excavation an...
10/08/2026

⛏️ Cleanup complete at the Mesa V Mine Complex on the Navajo Nation!

EPA and our contractors have completed excavation and hauling at the Mesa V mine, part of the Lukachukai Mountains Mining District, wrapping up cleanup of three large uranium mine waste piles — the Adit, Incline, and Mine 103 piles. 🚜

Nearly 20,000 cubic yards of contaminated mine waste was excavated and moved to a nearby on-site repository, designed to blend into the surrounding landscape.🌄

Through mid-November, EPA will continue restoring the site with native vegetation, tree planting, and stormwater management. 🌿💧

This cleanup marks a major milestone in EPA’s work to address abandoned uranium mine waste and protect the land and communities that call this area home. 🌱

Learn more at: https://www.epa.gov/navajo-nation-uranium-cleanup

💧 Protecting drinking water in the San Fernando Valley!EPA has signed a plan to continue cleaning up contaminated ground...
10/05/2026

💧 Protecting drinking water in the San Fernando Valley!

EPA has signed a plan to continue cleaning up contaminated groundwater at the San Fernando Valley (Area 2) Superfund site. 🧪🌎

For more than 26 years, EPA’s groundwater treatment system has helped protect local water supplies - treating more than 58 billion gallons of groundwater since 2000. Today, all water served to the public meets state and federal health and safety standards. 🚰✅

The updated cleanup plan will build on that progress by:
💧 Increasing groundwater pumping from existing extraction wells
🔧 Installing a new groundwater well
⚙️ Reducing maintenance needs
🧪 Upgrading the chromium treatment system

Together, these improvements will help prevent contamination from spreading and continue providing with safe, reliable local drinking water. 💙

🥕🍠🍆It's the International Day of Awareness of Food Loss and Waste, and we're thanking our partners in the Pacific Southw...
09/29/2026

🥕🍠🍆It's the International Day of Awareness of Food Loss and Waste, and we're thanking our partners in the Pacific Southwest who are helping put good food to use, redirecting food from landfills to the tables of families and communities in need. 🍽️

Please join us at the U.S. Environmental Protection Agency as we recognize the organizations working hard to . Read about our partner organizations below, and find more information about the Feed it Onward program at www.epa.gov/sustainable-management-food/feed-it-onward

…

Waste Not Arizona rescues surplus food directly from restaurants, resorts, grocery stores, caterers, and corporate campuses that would otherwise go to waste, and delivers it the same day, at no cost, to nonprofits serving people throughout the Phoenix area.

The Food Basket, Inc. - Hawai'i Island's Food Bank and Kōkua Harvest strive to create a model for food security and sustainability on Hawaiʻi Island. The program works to reduce food waste at the source, strengthen community ties, and improve access to fresh, nutritious fruits and vegetables for all.

California Food Banks partners with California growers to recover surplus produce from fields across the state and deliver it to food banks serving communities. In turn, families receive fresh California-grown fruits and vegetables alongside pantry staples and proteins.

Flagstaff Family Food Center rescues nearly 1 million pounds of food each year, redirecting food no longer suitable for people to farms and ranches as animal feed and compost. Their partnership with the Arizona Game & Fish Department also helps turn confiscated elk and deer from illegal poaching into nutritious protein for local families.

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75 Hawthorne Street
San Francisco, CA
94105

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