Rio del Mar Beach

Aptos, California
Managed by The Swim Guide

A popular beach featuring fire rings for bonfires, bathrooms and an outdoor shower. Dogs allowed on leash. Close to town so it's a short walk to stores and restaurants. A long, paved promenade is great for strollers, rollerskates, wheelchairs, and long walks in view of the surf.

WATER QUALITY
  • Passed water quality tests 60-95% of the time
  • Historical Status
  • This status is based on the latest sample, taken on . The Swim Guide updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on at
For water quality icon legend, click:   
CURRENT WEATHER
11°C
Cloudy
MONITORING FREQUENCY

is sampled weekly from 1 January to 31 December

SOURCE INFORMATION

Santa Cruz County’s department of Environmental Health Services provides recreational water quality to the public through their website and by calling 831-454-3188. Samples are collected and tested for the levels of 3 types of bacteria. Please refer to the monitoring frequency in the beach description as frequencies vary throughout the year.

Swim Guide checks daily for the latest results.

Country standards for indicator bacteria are as follows:
Total Coliform > 10,000 MPN (Most Probable Number) / 100 ml of water
E.coli > 400 MPN / 100 ml
Enterocococcus > 104 MPN / 100 ml

A beach will be marked Green when all three levels of bacteria are below standards

A beach will be marked Red when 1 of the bacteria levels are above the standard

A beach will be marked Grey when there is no current or reliable information.

The county advises that you avoid swimming in areas at risk to storm water runoff for at least 3 days after heavy rain.

WATER QUALITY GRAPH

Rio del Mar Beach

Aptos, California
Managed by The Swim Guide

WATER QUALITY
  • Passed water quality tests 60-95% of the time
  • Historical Status
  • This status is based on the latest sample, taken on . The Swim Guide updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on at
For water quality icon legend, click:   
CURRENT WEATHER
11°C
Cloudy

A popular beach featuring fire rings for bonfires, bathrooms and an outdoor shower. Dogs allowed on leash. Close to town so it's a short walk to stores and restaurants. A long, paved promenade is great for strollers, rollerskates, wheelchairs, and long walks in view of the surf.

MONITORING FREQUENCY

is sampled weekly from 1 January to 31 December

SOURCE INFORMATION

Santa Cruz County’s department of Environmental Health Services provides recreational water quality to the public through their website and by calling 831-454-3188. Samples are collected and tested for the levels of 3 types of bacteria. Please refer to the monitoring frequency in the beach description as frequencies vary throughout the year.

Swim Guide checks daily for the latest results.

Country standards for indicator bacteria are as follows:
Total Coliform > 10,000 MPN (Most Probable Number) / 100 ml of water
E.coli > 400 MPN / 100 ml
Enterocococcus > 104 MPN / 100 ml

A beach will be marked Green when all three levels of bacteria are below standards

A beach will be marked Red when 1 of the bacteria levels are above the standard

A beach will be marked Grey when there is no current or reliable information.

The county advises that you avoid swimming in areas at risk to storm water runoff for at least 3 days after heavy rain.

WATER QUALITY GRAPH



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