NAHANT — Save The Harbor/Save The Bay, a Boston nonprofit, has reported in its annual Water Quality Report Card that Nahant Beach received a 95% water quality rating.

The report is about the Nahant Reservation Beach, which runs along the Nahant Causeway and is managed by the Department of Conservation and Recreation (DCR). Town Administrator Alison Nieto said the report is great news, and the town does not have a direct relation with the change.

The Water Quality Report Card uses data collected by DCR to assess water quality at public beaches across the Massachusetts shoreline, including Lynn and Nahant.

This is an increase from the last four years, where Nahant Beach sat at a rating around 80%.

In the previous report cards, Nahant scored 78% in 2024, 80% in 2023, 81% in 2022, 77% in 2021, and 96% in 2020.

The town’s six-year average water quality rating stands at 86% between 2020 and 2025.

Save The Harbor/Save The Bay surveyed 15 beaches across the Massachusetts shoreline. The average of all beaches surveyed in 2025 was 93%, a 9% increase from 2024.

“It is gratifying to once again see so many of our spectacular urban beaches consistently testing at safe bacteria levels,” Save the Harbor/Save the Bay’s Executive Director Chris Mancini said.

“The region-wide scores above 80% are a testament to what sustained investment and scientific rigor can achieve.”

Mancini said as the organization marks its 40th anniversary this year, it is “as committed as ever to ensuring anyone can confidently get into or out on the water without worrying about bacteria and other pollution.”

Save The Harbor/Save The Bay has the mission of restoring and protecting Boston Harbor, Massachusetts Bay, and the marine environment.

“The continued strong performance of our metropolitan beaches is a testament to 40 years of investment in water infrastructure and the tireless commitment of our partners at DCR and Save the Harbor,” said Senator Brendan Crighton (D-3 Essex), Co-Chair of the Metropolitan Beaches Commission. “As climate pressures intensify, we must remain vigilant and continue investing in the systems that protect public health and access to clean water for all.”

As a part of the same report, Kings Beach in Lynn achieved the largest jump in its rating, receiving a 90% water quality rating. This is an increase from the six-year average of 69% and 2023’s record low of 55%.

Currently, beaches use a posting and flagging system to alert the public to high bacteria levels. However, testing technology takes 24 hours to return results. So, by the time warnings are posted, the information is already outdated.