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2025 Bathing Beach Water Test Results
The Braintree Health Department considers an individual bathing beach water sample with an enterococci count less than 104 acceptable for bathing/swimming in marine water.
Counts greater than 104 indicate the water is unacceptable for swimming/bathing and the beach will be posted as such. A 5-sample Enterococci Geometric Mean value greater than 35 also indicates the water is unacceptable for swimming/bathing.
The Braintree Health Department considers an individual bathing beach water sample with an E. coli count less than 235 acceptable for bathing/swimming in fresh water.
Counts greater than 235 indicate the water is unacceptable for swimming/bathing and the beach will be posted as such. A 5-sample E. coli Geometric Mean value greater than 126 also indicates the water is unacceptable for swimming/bathing.
NA means not available.
*Rain event occurred within 24 hours of sample collection
Smith Beach
| Sample Date | Enterocci | 5-Sample Geomean | Acceptable for Bathing? |
|---|---|---|---|
| 6/24/25 | 20 | N/A | Yes |
| 7/1/25 | <10 | N/A | Yes |
| 7/8/25 | 10 | N/A | Yes |
| 7/11/25 | Sanitary sewer overflows (SSO) | N/A | No |
| 7/15/25 | 62 | N/A | Yes |
| 7/22/25 | 209 | 26.45 | No |
| 7/24/25 | 20 | 26.45 | Yes |
| 7/29/25 | <10 | 26.45 | Yes |
| 8/5/25 | 20 | 30.39 | Yes |
| 8/12/25 | <10 | 18.37 | Yes |
| 8/19/25 | 168 | 17.58 | No |
| 8/26/25 | 613 | 34.86 | No |
Sunset Lake
| Sample Date | E. Coli Count | 5-Sample Geomean | Acceptable for Bathing? |
|---|---|---|---|
| 6/24/25 | 8 | N/A | Yes |
| 7/1/25 | 28 | N/A | Yes |
| 7/8/25 | 15 | N/A | Yes |
| 7/15/25 | 32 | N/A | Yes |
| 7/22/25 | 16 | 17.67 | Yes |
| 7/29/25 | 56 | 26.07 | Yes |
| 8/5/25 | 10 | 21.22 | Yes |
| 8/12/25 | 80 | 29.66 | Yes |
| 8/19/25 | 60 | 33.63 | Yes |
| 8/26/25 | 460 | 65.83 | No |
| 8/28/25 | 5 | 40.61 | Yes |