Recreational Beaches


Swin Beach Sampling _7_forweb
SITC Department of Environmental Protection (DEP) conducts weekly bacterial monitoring of six swimming beaches during summer months (June – August) and monitors monthly throughout the rest of the year.
Specifically, we are monitoring for levels of Enterococci, which are a group of bacteria that may indicate the presence of fecal pollution which can cause gastrointestinal illnesses.
  • As of 2004, Enterococci took the place of fecal coliforms as the new federal standard for water quality at saltwater beaches.
  • EPA recommends Enterococci as the best indicator of health risk in saltwater used for recreation.
  • Public will be notified of samples above a beach action value of 60 colonies/100mL.
    • According to Swinomish draft water quality standards, Enterococci levels must not exceed a mean value of 30 colonies/100ml over a 30-day period.
    • Single sample values must not exceed 110 colonies/100ml.
  • Results are given in "most probable number" (or MPN) of colonies present in a sample and is based on the labratory analytical method that we use.
    • Bacterial analyses are conducted in-house in the Swinomish Environmental Lab.
    • In-House analysis provides the quickest turn around in processing samples, and allows us to resample immediately when needed.

Recreational Beaches


Phone (360) 542.7630


Dept.of Environmental Protection
11430 Moorage Way
La Conner, WA 98257


Mon-Wed | 8-6 PM
Thurs | 8-5:30 PM