Non-Transient Non-Community Water System · PWS IL3029405

Bristol Grade School

Yorkville, Illinois 60560 - drinking water served from groundwater sources to 325 people, tracked in EPA SDWIS and UCMR5.

Compiled by PlainWater Editorial, Drinking Water Quality Editorial Team · May 15, 2026

325
People served: 358
EPA violations: 0
Health-based: Untested
UCMR5 result

The verdict

EPA records 358 drinking-water violations at Bristol Grade School - above the Illinois per-system average.

358
Total EPA violations on record: 0%
Health-based (MCL / treatment failure): 325
People served by this system: N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Bristol Grade School

Bristol Grade School is a local-owned non-transient non-community water system that delivers drinking water to 325 residents in Yorkville, Illinois (Kendall County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 358 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 358 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 1,2,4-Trichlorobenzene, recorded in 16 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 Illinois, EPA tracks 5,117 public water systems serving 12,576,876 people, with 355,322 cumulative violations and 52,932 health-based violations on record. About 81% of systems in the state carry at least one violation, and state-wide the average per system is 69.4 violations. Statewide, 199 of 487 UCMR5-tested systems have reported PFAS detections (40.9%).

Bristol Grade School's 358 violations sit above the Illinois 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

325

Total Violations

358

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Non-Transient Non-Community
Owner Type: Local
Connections: 1
County: Kendall
School/Daycare: Yes
MCL Violations: 0
Monitoring Violations: 358
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
1,2,4-Trichlorobenzene	MR	16	2020
cis-1,2-Dichloroethylene	MR	16	2020
o-Dichlorobenzene	MR	16	2020
p-Dichlorobenzene	MR	16	2020
Vinyl chloride	MR	16	2020
1,1-Dichloroethylene	MR	16	2020
trans-1,2-Dichloroethylene	MR	16	2020
1,2-Dichloroethane	MR	16	2020
1,1,1-Trichloroethane	MR	16	2020
1,2-Dichloropropane	MR	16	2020
Trichloroethylene	MR	16	2020
1,1,2-Trichloroethane	MR	16	2020
Tetrachloroethylene	MR	16	2020
Ethylbenzene	MR	16	2020
Xylenes, Total	MR	16	2020
CHLOROBENZENE	MR	16	2020
Benzene	MR	16	2020
Styrene	MR	16	2020
Toluene	MR	16	2020
Carbon tetrachloride	MR	16	2020
DICHLOROMETHANE	MR	16	2020
Lead and Copper Rule	MR	15	2024
Nitrate	MR	6	2023
Coliform (TCR)	MR	1	1992

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 Bristol Grade School.

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 IL3029405 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Illinois Drinking Water Authority

Illinois EPA, Bureau of Water is the primacy agency that licenses and inspects Bristol Grade School under EPA-delegated authority.

Open IL regulator portal

Source: Illinois EPA, Bureau of Water

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	Lead and Copper Rule	MR	15	SDWIS / IL3029405 / 5000
2023	Nitrate	MR	6	SDWIS / IL3029405 / 1040
2020	1,2,4-Trichlorobenzene	MR	16	SDWIS / IL3029405 / 2378
2020	cis-1,2-Dichloroethylene	MR	16	SDWIS / IL3029405 / 2380
2020	o-Dichlorobenzene	MR	16	SDWIS / IL3029405 / 2968
2020	p-Dichlorobenzene	MR	16	SDWIS / IL3029405 / 2969
2020	Vinyl chloride	MR	16	SDWIS / IL3029405 / 2976
2020	1,1-Dichloroethylene	MR	16	SDWIS / IL3029405 / 2977
2020	trans-1,2-Dichloroethylene	MR	16	SDWIS / IL3029405 / 2979
2020	1,2-Dichloroethane	MR	16	SDWIS / IL3029405 / 2980
2020	1,1,1-Trichloroethane	MR	16	SDWIS / IL3029405 / 2981
2020	1,2-Dichloropropane	MR	16	SDWIS / IL3029405 / 2983
2020	Trichloroethylene	MR	16	SDWIS / IL3029405 / 2984
2020	1,1,2-Trichloroethane	MR	16	SDWIS / IL3029405 / 2985
2020	Tetrachloroethylene	MR	16	SDWIS / IL3029405 / 2987

How Bristol Grade School Compares

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

Metric	Bristol Grade School	Illinois avg	Federal benchmark
Total violations	358	69.4	SDWA compliance, any non-zero count is a recorded breach
Health-based violations	0	10.3	Indicates a contaminant exceeded a federal MCL
PFAS detection	None	40.9%	EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served	325	2,458	Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 5,117 regulated public water systems in Illinois.

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 Bristol Grade School water safe to drink? ▼

Bristol Grade School (PWS ID: IL3029405) has 358 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 325 people using Groundwater sources.

How many people does Bristol Grade School serve? ▼

Bristol Grade School serves 325 people in Yorkville, Illinois. It is a Local-owned system using Groundwater water sources with 1 service connections.

What type of violations does Bristol Grade School have? ▼

Bristol Grade School has 358 total violations: 0 health-based violations (MCL exceedances or treatment failures), 358 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Bristol Grade School water? ▼

No PFAS testing data is available for Bristol Grade School under the EPA's UCMR5 monitoring program.

What water source does Bristol Grade School use? ▼

Bristol Grade School uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.

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.