Pennsylvania · drinking water · SDWIS through latest publish

Chambersburg Boro Water Sys Water Quality — Chambersburg, Pennsylvania

PWSID PA7280005 · Surface waterMunicipal

31,048 people served. 1 health-based SDWIS violation recorded in the past 5 years. 1 remains unresolved. Last cited 1 year ago.

ALL SDWIS VIOLATIONS · 20232026 (annual count)
Bar chart of annual values from 2023 to 2026, in violations. Most recent year (2026): 0 violations.16 violations'23'24'25'260 violations
Anomaly engine

Active signals

UNRESOLVED VIOLATION · SDWIS VIOLATION

Bromate

Unresolved Disinfectants and Disinfection Byproducts (Stage 2) violation cited in 2025 (bromate).

EPA SDWIS record

HEALTH-BASED · 5-YEAR WINDOW · SDWIS VIOLATION

Mercury (inorganic)

Phase I/II/V Inorganic Chemical Rules health-based violation cited in 2023 (mercury (inorganic)).

EPA SDWIS record

Most-cited contaminants

What This Utility Gets Cited For

  • Bromate6 citations
  • Mercury (inorganic)4 citations
  • Contaminant 02003 citations
  • Haloacetic Acids (HAA5)3 citations
  • Total Trihalomethanes (TTHM)3 citations
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.

MONITORING · BROMATEUNRESOLVED

2025 · Bromate · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled

CONTAMINANT CODE 2920

MONITORING · BROMATE

2024 · Bromate · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2920

MONITORING · BROMATE

2024 · Bromate · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2920

MONITORING · CONTAMINANT 0200

2023 · Contaminant 0200 · Surface Water Treatment Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0200

MONITORING · CONTAMINANT 0200

2023 · Contaminant 0200 · Surface Water Treatment Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0200

MONITORING · CONTAMINANT 0200

2023 · Contaminant 0200 · Surface Water Treatment Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0200

MONITORING · HALOACETIC ACIDS (HAA5)

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2456

MONITORING · HALOACETIC ACIDS (HAA5)

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2456

MONITORING · HALOACETIC ACIDS (HAA5)

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2456

MONITORING · TOTAL TRIHALOMETHANES (TTHM)

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2950

MONITORING · TOTAL TRIHALOMETHANES (TTHM)

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2950

MONITORING · TOTAL TRIHALOMETHANES (TTHM)

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2950

HEALTH-BASED · MERCURY (INORGANIC)

2023 · Mercury (inorganic) · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 1025

MONITORING · MERCURY (INORGANIC)

2023 · Mercury (inorganic) · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1025

MONITORING · MERCURY (INORGANIC)

2023 · Mercury (inorganic) · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1025

MONITORING · MERCURY (INORGANIC)

2023 · Mercury (inorganic) · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1025

MONITORING · BROMATE

2023 · Bromate · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2920

MONITORING · BROMATE

2023 · Bromate · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2920

MONITORING · BROMATE

2023 · Bromate · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2920

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

Who Drinks This Water

Chambersburg, Pennsylvania (Census place; block-group disparity scores aggregated by centroid containment): a service population of 21,917. Local disparity score for pm2.5 (fine particulate) sits below the reference (51). Why we surface this →

POPULATION SHARE
13.7%

Low-income

POPULATION SHARE
33.5%

People of color

POPULATION SHARE
6.8%

Under age 5

POPULATION SHARE
19.4%

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.36below the national median
  • OzoneHealth riskGround-level ozone (smog) inflames the airways. Even short exposures trigger asthma attacks and worsen chronic lung and heart disease.19below 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.50near 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.68above 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.69above 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.40below 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.78above the national median
  • 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.78above 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.84in the highest 20% nationally
  • 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.37below the national median
  • 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.75above 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.52near 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.76above the national median
EJ disparity scores · service-area block groups (100 = national reference; higher = greater disparate burden)
IndicatorDisparity scoreReading
PM2.5 (fine particulate)51below the reference
Ozone70below the reference
Nitrogen dioxide (NO₂)68below the reference
Diesel particulate86below the reference
Toxic releases (RSEI)71below the reference
Traffic proximity55below the reference
Lead-paint risk (pre-1960 housing)100near the reference
Superfund site proximity106near the reference
RMP-facility proximity111moderately above the reference
Hazardous-waste site proximity51below the reference
Underground storage tanks81below the reference
NPDES wastewater proximity70below the reference
Drinking-water non-compliance0well 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 2023-01-012026-05-07.

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.