Massachusetts · drinking water · SDWIS through latest publish

Longmeadow Water Dept Water Quality — Longmeadow, Massachusetts

PWSID MA1159000 · Purchased / wholesaleMunicipal

15,853 people served. 8 health-based SDWIS violations recorded in the past 5 years. 3 remain unresolved. Last cited 2 years ago.

ALL SDWIS VIOLATIONS · 20202026 (annual count)
Bar chart of annual values from 2020 to 2026, in violations. Most recent year (2026): 0 violations.6 violations'20'21'22'23'24'25'260 violations
Anomaly engine

Active signals

UNRESOLVED VIOLATION · SDWIS VIOLATION

Total Trihalomethanes (TTHM)

Unresolved Total Trihalomethanes Rule violation cited in 2022 (total trihalomethanes (tthm)).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 0400

Unresolved Lead and Copper Rule violation cited in 2022 (contaminant 0400).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 0400

Unresolved Lead and Copper Rule violation cited in 2021 (contaminant 0400).

EPA SDWIS record

HEALTH-BASED · 5-YEAR WINDOW · SDWIS VIOLATION

Contaminant 0400

Disinfectants and Disinfection Byproducts (Stage 2) health-based violation cited in 2024 (contaminant 0400).

EPA SDWIS record

Most-cited contaminants

What This Utility Gets Cited For

  • Contaminant 04009 citations
  • Haloacetic Acids (HAA5)4 citations
  • Total Trihalomethanes (TTHM)1 citation
Violation history

What's On The SDWIS Record

Health-based violations exceed an MCL or treatment-technique standard. Monitoring violations are reporting failures with no measured exceedance — they tell you the system isn't fully transparent, not that the water is unsafe today.

HEALTH-BASED · CONTAMINANT 0400

2024 · Contaminant 0400 · Disinfectants and Disinfection Byproducts (Stage 2)

Treatment technique violation; returned to compliance

CONTAMINANT CODE 0400

HEALTH-BASED · CONTAMINANT 0400

2024 · Contaminant 0400 · Disinfectants and Disinfection Byproducts (Stage 2)

Treatment technique violation; returned to compliance

CONTAMINANT CODE 0400

HEALTH-BASED · CONTAMINANT 0400

2024 · Contaminant 0400 · Disinfectants and Disinfection Byproducts (Stage 2)

Treatment technique violation; returned to compliance

CONTAMINANT CODE 0400

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

MONITORING · CONTAMINANT 0400UNRESOLVED

2022 · Contaminant 0400 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 0400

MONITORING · CONTAMINANT 0400UNRESOLVED

2021 · Contaminant 0400 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 0400

MONITORING · CONTAMINANT 0400

2021 · Contaminant 0400 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0400

MONITORING · CONTAMINANT 0400

2021 · Contaminant 0400 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0400

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2020 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2020 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2020 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2020 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

MONITORING · CONTAMINANT 0400

2020 · Contaminant 0400 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0400

MONITORING · CONTAMINANT 0400

2020 · Contaminant 0400 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0400

Equity context · ACS 2018-2022 · USEPA-clone EJ disparity

Who Drinks This Water

Longmeadow, Massachusetts (Census place; block-group disparity scores aggregated by centroid containment): a service population of 15,789. Local disparity score for pm2.5 (fine particulate) sits well below the reference (15). Why we surface this →

POPULATION SHARE
3.8%

Low-income

POPULATION SHARE
13.4%

People of color

POPULATION SHARE
6.0%

Under age 5

POPULATION SHARE
22.7%

Over age 64

NATIONAL PERCENTILE · vs all US block groups (population-weighted; ranked against the national EJScreen indicator distribution)

  • PM2.5 (fine particulate)Health riskFine inhalable particles 2.5 micrometers or smaller. They travel deep into the lungs and into the bloodstream — linked to asthma, heart disease, stroke, and premature death.37below the national median
  • OzoneHealth riskGround-level ozone (smog) inflames the airways. Even short exposures trigger asthma attacks and worsen chronic lung and heart disease.41near the national median
  • Nitrogen dioxide (NO₂)Health riskA tailpipe and combustion gas. Concentrates near busy roads and industrial sites; raises risk of airway inflammation, asthma, and lower respiratory infections in children.40near the national median
  • Diesel particulateHealth riskSoot from diesel engines (trucks, trains, ports, construction). EPA classifies it as a likely human carcinogen and a major driver of childhood asthma near freight corridors.54near the national median
  • Toxic releases (RSEI)Health riskEPA's Risk-Screening Environmental Indicators score — weights TRI chemical releases by toxicity, where they go, and how many people are nearby. Higher means greater modeled cancer and chronic-health risk.74above the national median
  • Traffic proximityHealth riskPopulation-weighted distance to high-volume roads. Living close to heavy traffic raises exposure to PM2.5, NO₂, and diesel exhaust — and the cardiovascular and asthma risks that follow.80above the national median
  • Lead-paint risk (pre-1960 housing)Health riskShare of housing built before 1960, when lead-based paint was common. Dust from deteriorating paint is the leading cause of childhood lead poisoning, which permanently impairs cognitive development.83in the highest 20% nationally
  • Superfund site proximityHealth riskPopulation-weighted distance to NPL Superfund sites — the most contaminated waste sites in the country. Nearby groundwater, soil, and air can carry industrial solvents, metals, and other long-lived contaminants.56near the national median
  • RMP-facility proximityHealth riskDistance to facilities holding chemicals at quantities large enough to require an EPA Risk Management Plan (refineries, fertilizer plants, etc.). These pose acute exposure risk during accidental releases.58near the national median
  • Hazardous-waste site proximityHealth riskDistance to RCRA hazardous-waste handlers (treatment, storage, disposal facilities). Indicates potential exposure to industrial chemicals in air, soil, and groundwater.80in the highest 20% nationally
  • Underground storage tanksHealth riskDensity of underground tanks (gasoline, heating oil, industrial fluids). Leaking tanks are a leading source of benzene and other volatile organic compounds in groundwater drinking-water supplies.51near the national median
  • NPDES wastewater proximityHealth riskDistance to permitted industrial wastewater dischargers. Closer proximity raises exposure to pollutants released into surface waters used for fishing, recreation, and downstream drinking-water intakes.41near the national median
  • Drinking-water non-complianceHealth riskEPA score for public water systems with health-based Safe Drinking Water Act violations. Higher means more residents on systems that recently exceeded safe limits for contaminants like lead, arsenic, or nitrate.93in the highest 10% nationally
EJ disparity scores · service-area block groups (100 = national reference; higher = greater disparate burden)
IndicatorDisparity scoreReading
PM2.5 (fine particulate)15well below the reference
Ozone19well below the reference
Nitrogen dioxide (NO₂)17well below the reference
Diesel particulate22well below the reference
Toxic releases (RSEI)30well below the reference
Traffic proximity32well below the reference
Lead-paint risk (pre-1960 housing)30well below the reference
Superfund site proximity0well below the reference
RMP-facility proximity23well below the reference
Hazardous-waste site proximity32well below the reference
Underground storage tanks20well below the reference
NPDES wastewater proximity16well below the reference
Drinking-water non-compliance37well below the reference

Source: Census ACS 2018-2022 (5-year) + USEPA-clone EJ blockgroup stats (raw indicators + EJ disparity mirror).

Source. EPA Safe Drinking Water Information System · retrieved 2026-05-07. Reporting period 2020-01-012026-05-07.

What this is not. SDWIS records compliance against federal MCLs — not a direct readout of tap-water concentrations. Active health-based violations are not the same as a current crisis; we link to the EPA record so you can verify return-to-compliance status before forming a conclusion.