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Environmental Health Services

Environmental Health Services

Beach Water Quality

Environmental Health Services takes ocean water samples at nineteen locations along the coast on a weekly basis. (Sampling locations are listed below.) Samples are analyzed for three types of indicator bacteria, which at sufficient concentrations indicate the potential presence of microbes that may cause human illness. A ratio of two of the three bacteria types are analyzed as well.  The results are compared to standards established by the State. If any of the State standards are not met, a Health Advisory is issued. A Health Advisory warns bathers to avoid water contact activities due to the presence of elevated levels of bacteria. An advisory spans fifty yards north and south of the area where the sample is collected. Beaches are posted with advisory signs and remain posted until sample results indicate that bacteria levels meet State standards.

A beach closure occurs when a specific beach location is closed to all water contact activities due to a higher health risk associated with known hazardous waste spills, such as untreated sewage reaching recreational waters. Environmental Health Services advises to avoid water contact activities during and 72 hours following rain events as the ocean water may be contaminated.

For future reference, bookmark this link (www.SurfSafeSLO.org) on your desktop or mobile device.

Beach Water Quality Results

See map below for a graphical view of beach status in San Luis Obispo County, as of the last sampling date (The map below may not reflect current conditions).

Laboratory results of the ocean water re-sample taken July 18, 2017 at the following location(s) was within the state bacteriological standards: CAY16: Cayucos Beach (North of the pier at the creek outfall). There are no posted advisories at this time.

Computer users, click here for a map showing current conditons

Beach Water Quality Status Hotline (805)788-3411

This map viewer is for Reference purposes only and may not reflect current beach water conditions. The County of San Luis Obispo does not assume liability for any damages caused by any errors or omissions in the data. The County of San Luis Obispo makes no warranty of any kind, express or implied, that these data are accurate and reliable, nor does the fact of distribution constitute such a warranty. Independent verification of all data contained on this map should be obtained by any user thereof. Users assume responsibility to determine the appropriate use of these data.

Helpful Links

Environmental Health Services
Office: 805.781.5544
FAX: 805.781.4211
Email: ehs@co.slo.ca.us