Community Water System · PWS IN5271024
Hamilton Grove
New Carlisle, Indiana 46552-9639 - drinking water served from groundwater sources to 384 people, tracked in EPA SDWIS and UCMR5.
- 384
- People served
- 310
- EPA violations
- 109
- Health-based
- Untested
- UCMR5 result
The verdict
EPA records 310 drinking-water violations at Hamilton Grove, 35% of them health-based - above the Indiana per-system average.
- 310
- Total EPA violations on record
- 35%
- Health-based (MCL / treatment failure)
- 384
- People served by this system
- N/A
- PFAS compounds detected (UCMR5)
Water Quality Snapshot: Hamilton Grove
Hamilton Grove is a private-owned community water system that delivers drinking water to 384 residents in New Carlisle, Indiana (St. Joseph County) through 26 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 310 total violations for this system , of which 109 (35%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 186 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.
The most frequently cited contaminant at this system is Total Haloacetic Acids (HAA5), recorded in 52 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 Indiana, EPA tracks 3,967 public water systems serving 5,774,616 people, with 352,710 cumulative violations and 35,932 health-based violations on record. About 96% of systems in the state carry at least one violation, and state-wide the average per system is 88.9 violations. Statewide, 93 of 229 UCMR5-tested systems have reported PFAS detections (40.6%).
Hamilton Grove's 310 violations sit above the Indiana 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
- Private
- Connections
- 26
- County
- St. Joseph
- School/Daycare
- No
- MCL Violations
- 109
- Monitoring Violations
- 186
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MCL | 52 | 2020 |
| TTHM | MCL | 39 | 2019 |
| TTHM | MR | 36 | 2025 |
| Total Haloacetic Acids (HAA5) | MR | 34 | 2025 |
| Coliform (TCR) | MCL | 18 | 1998 |
| Coliform (TCR) | MR | 12 | 2000 |
| Revised Total Coliform Rule | RPT | 9 | 2022 |
| Revised Total Coliform Rule | MON | 8 | 2021 |
| Consumer Confidence Rule | Other | 5 | 2025 |
| 1,2,4-Trichlorobenzene | MR | 4 | 2018 |
| cis-1,2-Dichloroethylene | MR | 4 | 2018 |
| Xylenes, Total | MR | 4 | 2018 |
| p-Dichlorobenzene | MR | 4 | 2018 |
| trans-1,2-Dichloroethylene | MR | 4 | 2018 |
| 1,2-Dichloroethane | MR | 4 | 2018 |
| 1,1,1-Trichloroethane | MR | 4 | 2018 |
| Carbon tetrachloride | MR | 4 | 2018 |
| 1,2-Dichloropropane | MR | 4 | 2018 |
| 1,1,2-Trichloroethane | MR | 4 | 2018 |
| CHLOROBENZENE | MR | 4 | 2018 |
| Benzene | MR | 4 | 2018 |
| Ethylbenzene | MR | 4 | 2018 |
| Styrene | MR | 4 | 2018 |
| Vinyl chloride | MR | 4 | 2018 |
| Tetrachloroethylene | MR | 4 | 2018 |
| 1,1-Dichloroethylene | MR | 4 | 2018 |
| DICHLOROMETHANE | MR | 4 | 2018 |
| o-Dichlorobenzene | MR | 4 | 2018 |
| Toluene | MR | 4 | 2018 |
| Trichloroethylene | MR | 4 | 2018 |
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 Hamilton Grove.
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 IN5271024 on SDWISSource: EPA SDWIS Federal Reports Search
Indiana Drinking Water Authority
Indiana Department of Environmental Management, Drinking Water Branch is the primacy agency that licenses and inspects Hamilton Grove under EPA-delegated authority.
Open IN regulator portalSource: Indiana Department of Environmental Management, Drinking Water Branch
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 |
|---|---|---|---|---|
| 2025 | TTHM | MR | 36 | SDWIS / IN5271024 / 2950 |
| 2025 | Total Haloacetic Acids (HAA5) | MR | 34 | SDWIS / IN5271024 / 2456 |
| 2025 | Consumer Confidence Rule | Other | 5 | SDWIS / IN5271024 / 7000 |
| 2022 | Revised Total Coliform Rule | RPT | 9 | SDWIS / IN5271024 / 8000 |
| 2022 | Radium-226 | MR | 3 | SDWIS / IN5271024 / 4020 |
| 2022 | Radium-228 | MR | 3 | SDWIS / IN5271024 / 4030 |
| 2022 | Lead and Copper Rule | MR | 3 | SDWIS / IN5271024 / 5000 |
| 2022 | Gross Alpha, Excl. Radon and U | MR | 3 | SDWIS / IN5271024 / 4000 |
| 2021 | Revised Total Coliform Rule | MON | 8 | SDWIS / IN5271024 / 8000 |
| 2020 | Total Haloacetic Acids (HAA5) | MCL | 52 | SDWIS / IN5271024 / 2456 |
| 2019 | TTHM | MCL | 39 | SDWIS / IN5271024 / 2950 |
| 2018 | 1,2,4-Trichlorobenzene | MR | 4 | SDWIS / IN5271024 / 2378 |
| 2018 | cis-1,2-Dichloroethylene | MR | 4 | SDWIS / IN5271024 / 2380 |
| 2018 | Xylenes, Total | MR | 4 | SDWIS / IN5271024 / 2955 |
| 2018 | p-Dichlorobenzene | MR | 4 | SDWIS / IN5271024 / 2969 |
How Hamilton Grove Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | Hamilton Grove | Indiana avg | Federal benchmark |
|---|---|---|---|
| Total violations | 310 | 88.9 | SDWA compliance, any non-zero count is a recorded breach |
| Health-based violations | 109 | 9.1 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | None | 40.6% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 384 | 1,456 | Sizing context for compliance burden |
Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 3,967 regulated public water systems in Indiana.
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 Hamilton Grove water safe to drink? ▼
How many people does Hamilton Grove serve? ▼
What type of violations does Hamilton Grove have? ▼
Has PFAS been detected in Hamilton Grove water? ▼
What water source does Hamilton Grove 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.