Overview
- State and local health agencies this weekend posted active closures and swim advisories across Massachusetts, New Jersey, Iowa, Washington and New York City, with the Massachusetts Department of Public Health reporting 24 closed beaches.
- New Jersey officials issued advisories at multiple coastal and inland sites and temporarily closed some areas after enterococci results exceeded the state threshold used to judge recreational water safety.
- Iowa's Department of Natural Resources advised against swimming at several inland lakes after tests showed elevated E. coli, which can cause severe gastrointestinal illness in young children and vulnerable people.
- Washington’s advisory map lists several sites with increased bacteria and some long-term or 'permanent' advisories, a marker of chronic contamination tied in some places to sewer and runoff problems.
- Officials cite stormwater runoff, leaking sewer lines, combined-sewer overflows, pet waste and failing septic systems as common sources, and agencies are using routine monitoring dashboards and follow-up sampling to determine when waters are safe to reopen.