State Report

Massachusetts

Total Water Systems

528

Total Contaminants

116

Massachusetts

's Water

Massachusetts relies on a combination of surface water sources, including the Quabbin and Wachusett Reservoirs, as well as groundwater aquifers. While the state boasts some of the strictest water quality standards in the nation, aging infrastructure and risks from urban runoff and industrial pollution pose ongoing concerns for residents.

Massachusetts

Total Water Systems

528

Total Contaminants

116

Massachusetts relies on a combination of surface water sources, including the Quabbin and Wachusett Reservoirs, as well as groundwater aquifers. While the state boasts some of the strictest water quality standards in the nation, aging infrastructure and risks from urban runoff and industrial pollution pose ongoing concerns for residents.

Largest Contaminants

Manganese

Water Systems Affected

467

People Impacted

6,656,428

Risk Level

30

/100

Learn more

Total trihalomethanes

Water Systems Affected

372

People Impacted

6,570,251

Risk Level

75

/100

Learn more

Chloroform

Water Systems Affected

335

People Impacted

6,502,901

Risk Level

78

/100

Learn more

Nitrate

Water Systems Affected

481

People Impacted

6,388,056

Risk Level

45

/100

Learn more

Bromodichloromethane

Water Systems Affected

314

People Impacted

6,304,098

Risk Level

70

/100

Learn more

Haloacetic acids

Water Systems Affected

296

People Impacted

6,298,824

Risk Level

45

/100

Learn more
Massachusetts Water Health Analysis

Massachusetts Water Health Analysis

Overall Health Analysis

Massachusetts is home to 528 water systems supplying water to millions of residents. Recent findings indicate a concerning reality: the state's water contains a staggering 116 different contaminants. Among these, six stand out as the most prevalent and potentially harmful—Manganese, Total Trihalomethanes, Nitrate, Chloroform, Bromodichloromethane, and Haloacetic Acids. Combined, they affect millions of people, with some contaminants reaching over 6.5 million individuals. These contaminants, stemming from both natural and industrial sources, pose significant health risks, making water quality a pressing issue for public health in the state.

Top Six Contaminants

Manganese

Number of Water Systems Affected: 467
Number of People Affected: 6,656,428
Manganese is a naturally occurring element often found in soil and groundwater. While essential in small amounts, excessive manganese exposure through drinking water can cause neurological issues, particularly in infants and young children. Prolonged exposure has been linked to learning disabilities and behavioral problems, making it a significant concern for public health.

Total Trihalomethanes (TTHMs)

Number of Water Systems Affected: 372
Number of People Affected: 6,570,251
Total Trihalomethanes, byproducts of the disinfection process used in water treatment, form when chlorine reacts with natural organic matter. Long-term ingestion is associated with an increased risk of cancers, particularly bladder cancer. Vulnerable populations, including pregnant women, are at risk for adverse birth outcomes such as low birth weight.

Nitrate

Number of Water Systems Affected: 335
Number of People Affected: 6,502,901
Nitrate contamination often originates from agricultural runoff, septic systems, and industrial discharges. High levels of nitrate in drinking water are particularly dangerous for infants, as they can cause methemoglobinemia, or "blue baby syndrome," a condition that reduces the ability of blood to carry oxygen. Chronic exposure can also increase the risk of cancer and other long-term health effects.

Chloroform

Number of Water Systems Affected: 481
Number of People Affected: 6,388,056
Chloroform, another byproduct of the disinfection process, poses serious health implications. Prolonged exposure has been linked to liver and kidney damage as well as cancer. Inhalation during showers or ingestion of contaminated water contributes to cumulative exposure, elevating health risks for residents.

Bromodichloromethane

Number of Water Systems Affected: 314
Number of People Affected: 6,304,098
Bromodichloromethane, like chloroform, is a disinfection byproduct created during water treatment. It has been classified as a potential human carcinogen due to its links with an increased risk of bladder and colon cancers. Chronic exposure can also lead to liver damage, further magnifying the public health threat.

Haloacetic Acids (HAAs)

Number of Water Systems Affected: 296
Number of People Affected: 6,298,824
Haloacetic Acids are a group of disinfection byproducts that result from the reaction between chlorine and organic material in water. Long-term exposure has been linked to elevated cancer risks and reproductive issues, including birth defects. Children and pregnant women are particularly at risk, highlighting the urgent need for monitoring and mitigation.

Most Significant Health Impacts

The contaminants found in Massachusetts’ water systems pose serious, widespread health threats. The most significant health impacts include:

  • Cancer Risk: Carcinogens like Total Trihalomethanes, Chloroform, Bromodichloromethane, and Haloacetic Acids have been shown to increase the likelihood of cancers, especially bladder, liver, and colon cancers.
  • Neurological Effects: Contaminants like Manganese can impair cognitive development in children and lead to long-term neurological disorders.
  • Reproductive Issues: Disinfection byproducts such as Haloacetic Acids are associated with pregnancy complications, birth defects, and low birth weight in infants.
  • Oxygen Deprivation: Nitrate contamination is particularly dangerous for infants, causing "blue baby syndrome," which impairs oxygen delivery in the body.
  • Organ Damage: Prolonged exposure to several contaminants, including Chloroform and Bromodichloromethane, can cause liver and kidney damage.

Elderly individuals, pregnant women, and children face the highest risks, as they are more susceptible to the adverse effects of these pollutants.

Conclusion

The water health in Massachusetts presents significant challenges, with contaminants affecting millions of residents across hundreds of water systems. While state and federal regulations exist, the prevalence of harmful substances such as manganese, disinfection byproducts, and agricultural pollutants signifies room for improvement in monitoring and treatment processes. Efforts to enhance filtration technologies, implement stricter regulations, and increase public awareness are essential. Understanding the specific quality of the water you and your loved ones consume is a critical step toward protecting your health and well-being.

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