Haloacetic Acids (HAA5)
Unresolved Total Trihalomethanes Rule violation cited in 2020 (haloacetic acids (haa5)).
PWSID MA1281000 · Surface waterMunicipal
167,954 people served. 12 health-based SDWIS violations recorded in the past 5 years. 18 remain unresolved. Last cited 5 years ago.
Unresolved Total Trihalomethanes Rule violation cited in 2020 (haloacetic acids (haa5)).
Unresolved Total Trihalomethanes Rule violation cited in 2020 (haloacetic acids (haa5)).
Unresolved Total Trihalomethanes Rule violation cited in 2020 (haloacetic acids (haa5)).
Unresolved Total Trihalomethanes Rule violation cited in 2020 (haloacetic acids (haa5)).
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.
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Springfield, Massachusetts (Census place; block-group disparity scores aggregated by centroid containment): a service population of 155,305. Local disparity score for pm2.5 (fine particulate) sits below the reference (81). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 81 | below the reference |
| Ozone | 98 | near the reference |
| Nitrogen dioxide (NO₂) | 174 | well above the reference burden |
| Diesel particulate | 144 | moderately above the reference |
| Toxic releases (RSEI) | 149 | moderately above the reference |
| Traffic proximity | 194 | well above the reference burden |
| Lead-paint risk (pre-1960 housing) | 181 | well above the reference burden |
| Superfund site proximity | 0 | well below the reference |
| RMP-facility proximity | 189 | well above the reference burden |
| Hazardous-waste site proximity | 187 | well above the reference burden |
| Underground storage tanks | 159 | well above the reference burden |
| NPDES wastewater proximity | 90 | near the reference |
| Drinking-water non-compliance | 200 | severely above the reference burden |
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 2020-01-01 → 2026-05-07.
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.