Santa Ana River - McLean/Anza Narrows Park
Historical Water Quality
See Source Info tab to understand what these results mean
Passed water quality tests 60-95% of the time
This status is based on the latest sample, taken on August 11th, 2026 Inland Empire Waterkeeper updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on August 12th, 2026 at 14:54.
Santa Ana River - McLean/Anza Narrows Park is sampled Weekly from January 1st to December 31st.
Santa Ana River - McLean/Anza Narrows Park
Current Weather
Source Information
The Santa Ana River is tested weekly by Inland Empire Waterkeeper's Stream Team. The Team updates the water quality status of popular recreation sites on Swim Guide as soon as results become available. In California, maximum levels for bacteria are established for recreational open beach waters. Single sample maximum levels are 10,000 total coliform /100 ml. Objectives for freshwater recreation are based on e.coli density. The 30 day geometric mean e.coli density shall not exceed 126/100ml and a single sample limit not to exceed 235/100ml. Swimmers are advised not to swim within 100 feet of a flowing storm drain. Swimmers are also advised to stay out of the water for 72 hours following a rain event in the area.
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