- Mon-Fri | 8:30 AM - 4:30 PM
District Headquarters
50 Elm St, Dedham, MA 02026
During Office Hours:
781-329-7090
After Hours Emergency:
781-326-1250
50 Elm St, Dedham, MA 02026
781-329-7090
781-326-1250
The Dedham – Westwood Water District is pleased to announce that we have achieved compliance and are no longer in violation of a Tier 2 Massachusetts Drinking Water Regulation. Together, our team of water professionals executed a plan to reduce the locational running annual average (LRAA) for total trihalomethanes (TTHM) in the public drinking water supply, including flushing the water distribution system, blending water from the Massachusetts Water Resources Authority (MWRA), and continually sampling and monitoring the levels of TTHM in the water to ensure our actions were having an impact and to protect public health and safety.
| Sample Location | Q2 (Apr – Jun) | Q3 (Jul – Sep) | Q4 (Oct – Dec) | Q1 (Jan – Mar) | OEL Q1 | LRAA |
|---|---|---|---|---|---|---|
| Dedham Medical Associates | Date: 4/6/2021 ppb 58 | Date: 7/8/2021 ppb 89 | Date: 10/7/2021 ppb 118 | Date: 1/6/2022 ppb 24 | 64 | 73 |
| Getty Gas Station | Date: 4/6/2021 ppb 33 | Date: 7/8/2021 ppb 46 | Date: 10/7/2021 ppb 81 | Date: 1/6/2022 ppb 57 | 60 | 54 |
| East Dedham Fire Station | Date: 4/6/2021 ppb 45 | Date: 7/8/2021 ppb 64 | Date: 10/7/2021 ppb 42 | Date: 1/6/2022 ppb 24 | 39 | 44 |
| Far Reach Pump Station | Date: 4/6/2021 ppb 58 | Date: 7/8/2021 ppb 89 | Date: 10/7/2021 ppb 109 | Date: 1/6/2022 ppb 23 | 61 | 70 |
| MCL = 80 (ppb) | Was OEL exceeded | NO | Was the MCL exceeded | NO |
TTHMs are a group of disinfection byproducts that form when chlorine compounds, which are used to disinfect water, react with other naturally occurring chemicals in the water. They are colorless and will evaporate out into the air. There are four significant TTHM (chloroform, bromoform, bromodichloromethane, and dibromochloromethane) potentially found in disinfected drinking water and their combined concentration is referred to as total TTHM.
The Dedham-Westwood Water District is working with the MWRA to continue to blend the water supply, while our consultant, Weston & Sampson is in the process of designing an enhance treatment process to our Bridge Street Water Treatment Plant that includes the installation of tank mixers, aerators, and vents. We anticipate implementing the procurement process to begin in the spring of 2022, with construction to follow later in the year.
We will continue to monitor the public drinking water supply for all regulated inorganic substances, synthetic organics, volatile organic compounds (vocs), Total Coliform, e.coli bacteria, unregulated (secondary) substances, organic disinfection byproducts, radionuclides, as well as lead and copper. Our team is committed to providing clean, safe water. As stewards of this valuable resource, we take our job to protect public health and safety seriously. Our team of 30+ professionals work around the clock to provide reliable, cost-effective, high-quality water service that protects public health, promotes environmental stewardship, maintains customer confidence, and supports economic development and sustainability.
Our office is open from 8:30AM to 4:30PM Monday through Friday. The office is located at 50 Elm Street, Dedham MA, 02026.