Massachusetts Lists 32 Beaches Closed for Bacteria and Blooms

Swimming was not recommended at 32 Massachusetts beaches as of Sunday morning, August 2, 2026, according to the state’s public beach water quality monitoring database as reported by MassLive.

As of Monday, August 3, travelers should treat that roster as a starting list and recheck the live Massachusetts DPH Interactive Beach Water Quality Dashboard before packing for a swim. Postings can open or close after new samples and rain.

MassLive’s August 2 update said officials listed closures for elevated bacteria, harmful cyanobacteria blooms, combined sewer overflow or sanitary sewer overflow events, and other water quality concerns, with most postings tied to bacterial contamination.

State health language treats high bacteria as an illness risk for swimmers. Reported symptoms can include nausea, vomiting, diarrhea, abdominal pain, sore throat, cough, and skin rash when people swallow or contact contaminated water.

What the August 2 roster actually covered

MassLive published a town-by-town list drawn from the state monitoring database as of Sunday morning. The roster mixes North Shore saltwater beaches, inland ponds, DCR sites, Cape and Islands locations under Tisbury, and western Massachusetts ponds rather than one single shoreline event.

Named postings include multiple Kings Beach segments in Lynn, several Salem beaches, Winthrop’s Donovans and Pico, Beverly’s Mingo Beach, Dartmouth beaches tied to CSO or SSO events, Chicopee Beach and Oxford’s Carbuncle Pond for harmful cyanobacteria blooms, and Amherst’s Puffers Pond segments for bacterial exceedance.

That spread matters for trip planning because a Cape Cod itinerary is not automatically clean because a North Shore or inland pond is posted. A posted inland DCR beach does not close every saltwater park statewide. Build the day around the exact named water body you intend to enter.

Officials still distinguish water contact from shore use. A posted beach can remain open for volleyball, sunbathing, shell collecting, and dry-sand walks even when swimming is not recommended.

Deep Arrival’s things to do in Boston guide is a useful non-swim backup when eastern Massachusetts water days fail a morning dashboard check.

How to verify your beach before you drive

Do not rely on yesterday’s screenshot or a social media list alone. Massachusetts DPH maintains the interactive dashboard that labels open and closed beaches and updates through the swimming season.

Search the exact beach name, not only the town. Lynn, Salem, Dartmouth, and Tisbury each show multiple named segments with different reasons, so a town-level open claim can still hide a closed stretch.

Local boards reinforce the same process. Beverly’s beach testing page points residents to the MDPH dashboard for statewide results and has noted Mingo Beach among beaches closed for testing exceedances in 2026.

If your target beach is not monitored, treat that as its own risk signal. Unmonitored water can still be contaminated after heavy rain, near storm drains, or where birds and pets concentrate on the shoreline.

After heavy rain, recheck even if the beach was open the morning before. Runoff can push bacteria into swimming areas after the storm passes, and MassLive’s package noted Monday flash flood risk in parts of the state as a related planning pressure.

Bacteria, blooms, and overflow events are different labels

Bacterial exceedance is the dominant reason on the August 2 roster. Indicator organisms used in beach testing rise after runoff, sewer overflows, and warm still water conditions that let contamination linger near swimming areas.

Dartmouth’s Hidden Bay and Jones Town Beach segments were listed for CSO or SSO events. That is a different mechanism from a routine bacterial sample fail, and it often tracks recent wet weather and sewer system stress rather than a single sunny afternoon.

Cyanobacteria blooms closed Chicopee Beach and Carbuncle Pond in Oxford on the same list. Blooms can look like green paint, scum, or discolored mats. They are not the same as a bacterial exceedance label, but the traveler rule is still the same: stay out of the water while the posting remains.

Do not invent a reopening time. Sample results and rain forecasts change the board. The dashboard is the authority for whether a named beach is open for swimming on the day you arrive.

Parents should keep kids and pets out of the water even when they only want to wade. Shallow water near shore is often where contamination concentrates, and small children are more likely to swallow water.

What to do if your beach is posted

First, cancel only the swim plan, not the whole outing, if dry-sand recreation still fits your day. Second, move to a named open beach rather than walking a few hundred yards to an unposted stretch that may share the same water body.

Third, if you need guaranteed water time for kids, shift to a monitored pool, water park, or indoor option instead of gambling on a posted shoreline. Fourth, after any accidental water contact at a posted beach, rinse off and watch for illness symptoms rather than waiting for a second swim.

Travelers overnighting near Boston or the North Shore can keep lodging and restaurants while changing the recreation plan. Travelers driving from out of state should check the dashboard the morning of arrival, not only the night they booked the hotel.

This is not a statewide beach shutdown. It is a multi-site water quality advisory set that requires name-level checks. Treat MassLive’s August 2 list as a snapshot, not a permanent calendar for the rest of August.

People who only need photos and boardwalk time can still use posted beaches carefully while staying out of the water and obeying any local tape or signage at access points.

Keep a non-swim plan ready for eastern Massachusetts coastal days. If the first beach is still posted, pivot to a confirmed open site or a city day rather than waiting on the sand hoping for a mid-afternoon clear that may not come.

State guidance also urges basic pollution habits that protect swimming water over the season: clean up after pets, skip bird feeding near the beach, use public restrooms, bag trash, and keep fertilizer and pesticide runoff out of storm drains. Those steps do not reopen a closed beach today, but they reduce how often travelers face the same advisory loop later in the summer.

Who should treat this as a trip-day gate

Families with small children should treat a posted beach as a hard no for water play even if older relatives want a quick dip. Illness risk is higher for kids who swallow water and for anyone with open cuts.

Visitors on a short Boston weekend should decide early whether the coastal stop is worth the dashboard risk. If the morning check is still red for your named beach, convert the block to city time rather than burning fuel on a closed shoreline.

Seasonal renters along the North Shore and South Coast should bookmark the DPH dashboard for the rest of August rather than relying on a one-day news list. The August 2 snapshot is useful context, not a season-long schedule.

Massachusetts beach water quality can change overnight. Use the official dashboard for the morning decision, treat bacterial and bloom postings as hard water-contact holds, and keep the rest of the coastal day only if dry-sand activity still fits your plan.