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Community Water System · PWS IN5234001

The Oaks of Kokomo

Zionsville, Indiana 46077 - drinking water served from groundwater sources to 150 people, tracked in EPA SDWIS and UCMR5.

150
People served
391
EPA violations
32
Health-based
Untested
UCMR5 result

The verdict

EPA records 391 drinking-water violations at The Oaks of Kokomo, 8% of them health-based - above the Indiana per-system average.

391
Total EPA violations on record
8%
Health-based (MCL / treatment failure)
150
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: The Oaks of Kokomo

The Oaks of Kokomo is a private-owned community water system that delivers drinking water to 150 residents in Zionsville, Indiana (Howard County) through 70 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 391 total violations for this system , of which 32 (8%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 324 monitoring and reporting violations are on file. The most recent violation on record dates to 2020.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 28 violations (MR). 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%).

The Oaks of Kokomo's 391 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.

Population Served
150
Total Violations
391
Health-Based Violations
32
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
70
County
Howard
School/Daycare
No
MCL Violations
27
Monitoring Violations
324
Treatment Tech Violations
5

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 28 2015
Coliform (TCR) MCL 27 2015
Lead and Copper Rule MR 15 2020
Revised Total Coliform Rule RPT 15 2020
Nitrate MR 11 2019
Revised Total Coliform Rule MON 9 2020
Consumer Confidence Rule Other 8 2016
1,2,4-Trichlorobenzene MR 7 2018
Xylenes, Total MR 7 2018
o-Dichlorobenzene MR 7 2018
p-Dichlorobenzene MR 7 2018
Vinyl chloride MR 7 2018
1,1-Dichloroethylene MR 7 2018
trans-1,2-Dichloroethylene MR 7 2018
1,2-Dichloroethane MR 7 2018
1,1,1-Trichloroethane MR 7 2018
1,2-Dichloropropane MR 7 2018
Trichloroethylene MR 7 2018
1,1,2-Trichloroethane MR 7 2018
CHLOROBENZENE MR 7 2018
Benzene MR 7 2018
DICHLOROMETHANE MR 7 2018
Tetrachloroethylene MR 7 2018
Toluene MR 7 2018
Ethylbenzene MR 7 2018
Carbon tetrachloride MR 7 2018
cis-1,2-Dichloroethylene MR 7 2018
Styrene MR 7 2018
Gross Alpha, Excl. Radon and U MR 6 2017
Groundwater Rule TT 5 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 The Oaks of Kokomo.

Federal Source of Truth

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 IN5234001 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Indiana Drinking Water Authority

Indiana Department of Environmental Management, Drinking Water Branch is the primacy agency that licenses and inspects The Oaks of Kokomo under EPA-delegated authority.

Open IN regulator portal

Source: 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
2020 Lead and Copper Rule MR 15 SDWIS / IN5234001 / 5000
2020 Revised Total Coliform Rule RPT 15 SDWIS / IN5234001 / 8000
2020 Revised Total Coliform Rule MON 9 SDWIS / IN5234001 / 8000
2019 Nitrate MR 11 SDWIS / IN5234001 / 1040
2019 Groundwater Rule TT 5 SDWIS / IN5234001 / 0700
2019 Groundwater Rule Other 4 SDWIS / IN5234001 / 0700
2019 Endrin MR 2 SDWIS / IN5234001 / 2005
2019 Toxaphene MR 2 SDWIS / IN5234001 / 2020
2019 Diquat MR 2 SDWIS / IN5234001 / 2032
2019 Endothall MR 2 SDWIS / IN5234001 / 2033
2019 Glyphosate MR 2 SDWIS / IN5234001 / 2034
2019 Di(2-ethylhexyl) adipate MR 2 SDWIS / IN5234001 / 2035
2019 OXAMYL MR 2 SDWIS / IN5234001 / 2036
2019 Simazine MR 2 SDWIS / IN5234001 / 2037
2019 Di(2-ethylhexyl) phthalate MR 2 SDWIS / IN5234001 / 2039

How The Oaks of Kokomo Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric The Oaks of Kokomo Indiana avg Federal benchmark
Total violations 391 88.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 32 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 150 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 The Oaks of Kokomo water safe to drink? ▼
The Oaks of Kokomo (PWS ID: IN5234001) has 391 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 150 people using Groundwater sources.
How many people does The Oaks of Kokomo serve? ▼
The Oaks of Kokomo serves 150 people in Zionsville, Indiana. It is a Private-owned system using Groundwater water sources with 70 service connections.
What type of violations does The Oaks of Kokomo have? ▼
The Oaks of Kokomo has 391 total violations: 32 health-based violations (MCL exceedances or treatment failures), 324 monitoring/reporting violations, and 5 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in The Oaks of Kokomo water? ▼
No PFAS testing data is available for The Oaks of Kokomo under the EPA's UCMR5 monitoring program.
What water source does The Oaks of Kokomo use? ▼
The Oaks of Kokomo uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

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.