Community Water System · PWS MA1059000
Chester Water Dept
Chester, Massachusetts 01011 - drinking water served from surface water sources to 750 people, tracked in EPA SDWIS and UCMR5.
- 750
- People served
- 226
- EPA violations
- 26
- Health-based
- Untested
- UCMR5 result
The verdict
EPA records 226 drinking-water violations at Chester Water Dept, 12% of them health-based - above the Massachusetts per-system average.
- 226
- Total EPA violations on record
- 12%
- Health-based (MCL / treatment failure)
- 750
- People served by this system
- N/A
- PFAS compounds detected (UCMR5)
Water Quality Snapshot: Chester Water Dept
Chester Water Dept is a local-owned community water system that delivers drinking water to 750 residents in Chester, Massachusetts (Hampden County) through 250 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 226 total violations for this system , of which 26 (12%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 159 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.
The most frequently cited contaminant at this system is TTHM, recorded in 21 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.
Across Massachusetts, EPA tracks 1,599 public water systems serving 10,332,845 people, with 73,886 cumulative violations and 7,389 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 46.2 violations. Statewide, 148 of 263 UCMR5-tested systems have reported PFAS detections (56.3%).
Chester Water Dept's 226 violations sit above the Massachusetts average.
All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 250
- County
- Hampden
- School/Daycare
- No
- MCL Violations
- 22
- Monitoring Violations
- 159
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 21 | 2020 |
| Consumer Confidence Rule | Other | 8 | 2017 |
| Total Haloacetic Acids (HAA5) | MR | 7 | 2019 |
| Lead and Copper Rule | MR | 5 | 2023 |
| Nitrate | MR | 4 | 1995 |
| Arsenic | MR | 3 | 2005 |
| Public Notice | Other | 3 | 2010 |
| TTHM | MR | 3 | 2019 |
| LASSO | MR | 3 | 2019 |
| Carbofuran | MR | 3 | 2019 |
| Chlordane | MR | 3 | 2019 |
| 2,4-D | MR | 3 | 2019 |
| Endrin | MR | 3 | 2019 |
| ETHYLENE DIBROMIDE | MR | 3 | 2019 |
| Heptachlor epoxide | MR | 3 | 2019 |
| Heptachlor | MR | 3 | 2019 |
| Pentachlorophenol | MR | 3 | 2019 |
| Toxaphene | MR | 3 | 2019 |
| 2,4,5-TP | MR | 3 | 2019 |
| BHC-GAMMA | MR | 3 | 2019 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 3 | 2019 |
| Dalapon | MR | 3 | 2019 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2019 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 2019 |
| Endothall | MR | 3 | 2019 |
| OXAMYL | MR | 3 | 2019 |
| Simazine | MR | 3 | 2019 |
| 2,3,7,8-TCDD | MR | 3 | 2019 |
| Surface Water Treatment Rule | TT | 3 | 1992 |
| Picloram | MR | 3 | 2019 |
Verify This Water System
The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Chester Water Dept.
EPA SDWIS, Federal Reports
EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:
View PWS ID MA1059000 on SDWISSource: EPA SDWIS Federal Reports Search
Massachusetts Drinking Water Authority
MassDEP, Drinking Water Program is the primacy agency that licenses and inspects Chester Water Dept under EPA-delegated authority.
Open MA regulator portalSource: MassDEP, Drinking Water Program
Violation Timeline
Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.
| Year (latest) | Contaminant | Category | Count | EPA Record |
|---|---|---|---|---|
| 2024 | Long Term 2 Enhanced Surface Water Treatment Rule | TT | 1 | SDWIS / MA1059000 / 0800 |
| 2023 | Lead and Copper Rule | MR | 5 | SDWIS / MA1059000 / 5000 |
| 2020 | TTHM | MCL | 21 | SDWIS / MA1059000 / 2950 |
| 2019 | Total Haloacetic Acids (HAA5) | MR | 7 | SDWIS / MA1059000 / 2456 |
| 2019 | TTHM | MR | 3 | SDWIS / MA1059000 / 2950 |
| 2019 | LASSO | MR | 3 | SDWIS / MA1059000 / 2051 |
| 2019 | Carbofuran | MR | 3 | SDWIS / MA1059000 / 2046 |
| 2019 | Chlordane | MR | 3 | SDWIS / MA1059000 / 2959 |
| 2019 | 2,4-D | MR | 3 | SDWIS / MA1059000 / 2105 |
| 2019 | Endrin | MR | 3 | SDWIS / MA1059000 / 2005 |
| 2019 | ETHYLENE DIBROMIDE | MR | 3 | SDWIS / MA1059000 / 2946 |
| 2019 | Heptachlor epoxide | MR | 3 | SDWIS / MA1059000 / 2067 |
| 2019 | Heptachlor | MR | 3 | SDWIS / MA1059000 / 2065 |
| 2019 | Pentachlorophenol | MR | 3 | SDWIS / MA1059000 / 2326 |
| 2019 | Toxaphene | MR | 3 | SDWIS / MA1059000 / 2020 |
How Chester Water Dept Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | Chester Water Dept | Massachusetts avg | Federal benchmark |
|---|---|---|---|
| Total violations | 226 | 46.2 | SDWA compliance, any non-zero count is a recorded breach |
| Health-based violations | 26 | 4.6 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | None | 56.3% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 750 | 6,462 | Sizing context for compliance burden |
Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,599 regulated public water systems in Massachusetts.
Federal MCL reference, Safe Drinking Water Act thresholds ▼
| Contaminant | Federal MCL / Action Level | Note |
|---|---|---|
| Lead | 0 mg/L (Action Level: 0.015 mg/L) | Lead and Copper Rule treatment technique |
| Arsenic | 0.010 mg/L (10 ppb) | Health-based MCL since 2006 |
| Total Coliform | Treatment technique (RTCR) | Indicator organism, monitoring trigger |
| PFOA / PFOS (PFAS) | 4.0 ppt each (final 2024 rule) | Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026) |
| Nitrate (as N) | 10 mg/L | Acute health risk for infants |
Frequently Asked Questions
Is Chester Water Dept water safe to drink? ▼
How many people does Chester Water Dept serve? ▼
What type of violations does Chester Water Dept have? ▼
Has PFAS been detected in Chester Water Dept water? ▼
What water source does Chester Water Dept use? ▼
Where does this data come from? ▼
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.