1) Why is it risky to go in the water after it rains?
Storm water runoff can pick up bacteria, fertilizers, oil, sewage, and other contaminants on its journey into our oceans and waterways. All that gunk hits the beach in a concentrated mass, before slowly dispersing out into the rest of the ocean. One study out of UC Irvine found that fecal indicator bacteria concentrations were 500% higher than bathing water quality standards following rain events in Southern California.
2) How long should I wait before it’s safe to go back in?
The Department of Environmental Health recommends avoiding activities such as swimming, surfing, and diving for 72 hours after it rains. Research has shown that the risk of infection is the highest during and the day after rain, and declines to around normal levels after three days.
More information at the link.
Thanks for the heads up
Between the rains and all the toxic ash I saw on the sand last summer I think I’m going to avoid the beach for a while
If you haven't seen it, Heal the Bay did their own independent post-fire water quality reports, and have found that the risk to people has pretty much returned to normal levels; unfortunately, the repercussions of the fire will affect sea life for a lot longer, as many of the heavy metals will get tied up in their food web.
https://healthebay.org/ash-to-action/
This is really good information! Thanks for posting this!
I try to post this once a rainy season but I’ve been seeing a few questions from tourists asking about beaches the last few weeks so it reminded me. And stay off the beach during thunderstorms!
Bro water is cold af these days