Comprehensive Water Quality Report for Cambridge, MA

Updated April 25, 2026 | American Water Quality Research

Key takeaway: Cambridge, MA sources its water from the Hobbs Brook, Stony Brook, and Fresh Pond Reservoirs. Data suggests the presence of several contaminants, with some exceeding EWG health guidelines.

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Water Source for Cambridge, MA

The city of Cambridge, MA sources its water from the Hobbs Brook, Stony Brook, and Fresh Pond Reservoirs. These reservoirs are part of the Cambridge Water Department's system, which is responsible for supplying clean and safe drinking water to the residents.

Contaminants Detected

According to available reports from the EWG Tap Water Database, Cambridge's water contains several contaminants. Some of these contaminants include Total Trihalomethanes (TTHMs) and Haloacetic acids (HAA5), which are byproducts of water disinfection processes. Additionally, levels of bromodichloromethane, chloroform, and chromium (hexavalent) have been noted. While these contaminants were detected, they may not necessarily exceed federal limits but do surpass EWG's health guidelines.

EPA Violations and Advisories

As of the latest available data, there are no reported EPA violations for the Cambridge water system. However, the presence of contaminants above EWG health guidelines suggests that residents should be aware and consider additional water filtration measures.

Recommended Water Filters

To address the specific contaminants found in Cambridge's water supply, residents may consider the following types of water filters:

1. **Activated Carbon Filters**: Effective for reducing chlorine, TTHMs, and other organic contaminants.

2. **Reverse Osmosis Systems**: These systems are capable of removing a wide range of contaminants, including chromium (hexavalent) and TTHMs.

3. **Whole House Water Filters**: For comprehensive filtration throughout the home, these systems can reduce multiple contaminants, including those found in Cambridge's water.

Recommended Water Filters for Cambridge

Based on the contaminants and water source profile for Cambridge, these filtration systems are most effective:

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Frequently Asked Questions

Methodology: Data sourced from EPA SDWIS, local water authority reports, and EWG Tap Water Database.

Disclaimer: This report is for informational purposes. For medical advice, consult a healthcare professional.