Source Tracking Maynard

2023

Click to read report

This study was sparked by the consistently high E. coli bacteria levels we found from 2019 to 2022 in the Assabet River at the Route 27 bridge in Maynard. E. coli, originating from the digestive systems of warm-blooded animals, signals fecal contamination in the water. The Sudbury, Assabet, and Concord rivers all aim to meet a Class B water quality standard, ensuring they are safe for fishing and swimming. At OARS, we’re committed to making this goal a reality by identifying and eliminating sources of bacterial contamination. Over the past five years, we’ve closely monitored E. coli levels in the Assabet River, particularly at the Route 27 bridge, and have consistently found that these levels are higher than what’s considered safe. Determined to get to the bottom of this, we launched an intensive study in 2023. Our goal? To uncover the hidden sources of this bacterial pollution and work towards a cleaner, safer river for everyone.

Our dedicated OARS volunteers collected samples from five locations upstream of the Route 27 bridge, aiming to uncover the source of the bacterial pollution.

This work was made possible through funding from the Greater Lowell Community Foundation.

RETURN TO BACTERIA HEALTH & SAFETY

RETURN TO MONITORING & STUDIES

~30%

of the SuAsCo rivers watershed is wetlands, crucial for wildlife habitat and water quality

~30%

of water samples in the SuAsCo rivers watershed contain PFAS, leading to increased monitoring and remediation by local authorities and environmental groups

~70%

of dams in the SuAsCo watershed are over a century old, requiring extensive upkeep and presenting obstacles to river restoration and fish passage

>40%

of the land within the watershed is publicly accessible, offering recreational opportunities such as hiking, boating, and birdwatching to the community

~15%

of the land in the SuAsCo rivers watershed is covered by impervious surfaces such as roads, rooftops, and parking lots. This contributes to stormwater runoff and water pollution issues

>40%

of the land within the Sudbury, Assabet, and Concord rivers watershed is publicly accessible, providing endless opportunities for paddling, hiking, and wildlife exploration.

Source Tracking Maynard

ASSABET IN MAYNARD BACTERIA STUDY

Our dedicated OARS volunteers collected samples from five locations upstream of the Route 27 bridge, aiming to uncover the source of the bacterial pollution.

E. Coli

DNA Analysis

Detergent Survey

OARS is working with the Town of Maynard to eliminate this bacteria pollution. Our goal is to make the Assabet River safe for human contact through swimming, wading and exploring. The Assabet River is currently considered safe for boating and fishing-but not for eating the fish!