
Let's Clean Up the Arroyo Seco
Let's face it: water quality in the Arroyo Seco is bad. It's contaminated with dangerous salts and solvents, algae, trash and bacteria. It's so bad that the Arroyo Seco is listed as an "impaired stream" according to the federal Clean Water Act.
Find out more about what you can do the clean up the Arroyo Seco.
Clean Up the Arroyo Seco River

Join us for a Celebration at the beautiful NEW Hahamonga Annex
Hahamongna Watershed Park is expanding by 30 acres and you are invited to see this spectacular addition. Please join Pasadena officials on Saturday, January 23th, for self-guided tours from 10 a.m. to 2 p.m. and a ceremony at 11 a.m.
The entrance to Hahamongna Watershed Park is at 4600 Oak Grove Drive at the intersection of Foothill Boulevard. Follow balloons andsigns to the new Hahamongna Annex. Carpooling and bicycling are encouraged.

Congressman Schiff Fights for Arroyo Seco Study
Congressman Adam Schiff has renewed his fight for adequate funding the the Arroyo Seco Watershed Feasibility Study, a joint program of the US Army Corps of Engineers, the County of Los Angeles and Arroyo Seco cities. In a December 22, 2005 letter to Josh Bolton, Director of the federal Office of Management & Budget, the congressman urged full federal funding for the $3 million program.
Upcoming Arroyo Seco Events
Click on the date link for full details | |||
Date | Start Time | Title | Event Summary |
10:30 AM | Owen Brown Gravesite Event | A commemorative event will be held at the gravesite of Owen Brown in the foothills near Millard Canyon as part of Martin Luther King Day events. | |
7:00 PM | Water Quality in the Arroyo Seco | North East Trees will report on their water quality study of the Arroyo Seco and how the public can offer comments on the draft report as well as work to improve Arroyo water quality. | |
7:00 pm | The Tongva People | Richard Toyon, Tongva tribal representative, will present an inside look at the native people of our area in an Eagle Rock presentation. | |
7:00 PM | Water Quality in the Arroyo Seco | This meeting on water quality in the Arroyo Seco will be Altadena. This meeting will be similar to the 1/17 meeting at the LA River Center. | |
10:00 am | Arroyo Seco Water Quality Monitoring Training | Are you interested in participating in the Arroyo Seco Stream Team's Volunteer Water Quality monitoing program? This is your opportunity to get involved. |
News of the Arroyo
Click on the title link to read the entire story | ||
Title | Summary | |
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January 12, 2006 - Larry Wilson forges ahead on the ancient Millard Canyon trail, the eastern edge of the Arroyo Seco watershed. | ||
January 11, 2006 - Larry Wilson notes the doings in Altadena and Michele Zack's great history of the foothills. | ||
January 10, 2006 - Subtitle: "Mountain area closed to protect rare amphibian" A favorite climbing spot in the Angeles National Forest above La Canada has been closed to protect the mountain yellow-legged frog. | ||
Metropolitan Board Ratifies Initial Step of Plan to Overhaul CALFED Environmental Restoration Effort | January 10, 2006 - Subtitle: "Proposed Agreement Would Support Key Water Supply, Quality Actions in Bay-Delta" Major changes in the direction of the CALFED Bay Delta environmental restoration program are in the work. | |
January 6, 2006 - Larry Wilson describes his experience at a great football game in the Arroyo Seco. | ||
January 6, 2006 - Subhead: "Four major NASA groundwater cleanup project milestones reached" 2005 marked substantial progress in the cleanup of contaminated groundwater in the Arroyo Seco as this article in the Pasadena Independent relates. | ||
January 6, 2006 - Subtitle: "Water & Power Department to focus on security and production of local resources" Pasadena has adopted an updated water management plan that features improving the production of local resources to decrease the use of imported water. |