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Community Water System · PWS IL0930200

Plano

Plano, Illinois 60545 - drinking water served from groundwater sources to 12,600 people, tracked in EPA SDWIS and UCMR5.

12,600
People served
57
EPA violations
0
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 57 drinking-water violations at Plano - below the Illinois per-system average.

57
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
12,600
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Plano

Plano is a local-owned community water system that delivers drinking water to 12,600 residents in Plano, Illinois (Kendall County) through 4,187 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 57 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 38 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 Nitrate, recorded in 6 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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%).

Plano's 57 violations sit below 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
12,600
Total Violations
57
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
4,187
County
Kendall
School/Daycare
No
MCL Violations
0
Monitoring Violations
38
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 6 1993
Chlorine MR 5 2025
Revised Total Coliform Rule MON 4 2025
p-Dichlorobenzene MR 3 1992
1,1-Dichloroethylene MR 3 1992
1,1,1-Trichloroethane MR 3 1992
Trichloroethylene MR 3 1992
Carbon tetrachloride MR 3 1992
1,2-Dichloroethane MR 3 1992
Benzene MR 3 1992
Consumer Confidence Rule Other 2 2005
Lead and Copper Rule MR 1 1992
Gross Alpha, Excl. Radon and U MR 1 1977

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 174 samples detected PFAS.

Contaminant Date Result MRL Status
PFTA 6/21/2023 <8.00 ppt 8.00 ppt Not Detected
PFHpS 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 6/21/2023 <6.00 ppt 6.00 ppt Not Detected
PFDoA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
9Cl-PF3ONS 6/21/2023 <2.00 ppt 2.00 ppt Not Detected
PFTrDA 6/21/2023 <7.00 ppt 7.00 ppt Not Detected
PFUnA 6/21/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
NFDHA 6/21/2023 <20.00 ppt 20.00 ppt Not Detected
ADONA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFMBA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFPeA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFOS 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFTA 6/21/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 6/21/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFDoA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 6/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 6/21/2023 <6.00 ppt 6.00 ppt Not Detected
8:2 FTS 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpS 6/21/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
11Cl-PF3OUdS 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 6/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 6/21/2023 <2.00 ppt 2.00 ppt Not Detected
4:2 FTS 6/21/2023 <3.00 ppt 3.00 ppt Not Detected

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 Plano.

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 IL0930200 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 Plano 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
2025 Chlorine MR 5 SDWIS / IL0930200 / 0999
2025 Revised Total Coliform Rule MON 4 SDWIS / IL0930200 / 8000
2005 Consumer Confidence Rule Other 2 SDWIS / IL0930200 / 7000
1993 Nitrate MR 6 SDWIS / IL0930200 / 1040
1992 p-Dichlorobenzene MR 3 SDWIS / IL0930200 / 2969
1992 1,1-Dichloroethylene MR 3 SDWIS / IL0930200 / 2977
1992 1,1,1-Trichloroethane MR 3 SDWIS / IL0930200 / 2981
1992 Trichloroethylene MR 3 SDWIS / IL0930200 / 2984
1992 Carbon tetrachloride MR 3 SDWIS / IL0930200 / 2982
1992 1,2-Dichloroethane MR 3 SDWIS / IL0930200 / 2980
1992 Benzene MR 3 SDWIS / IL0930200 / 2990
1992 Lead and Copper Rule MR 1 SDWIS / IL0930200 / 5000
1977 Gross Alpha, Excl. Radon and U MR 1 SDWIS / IL0930200 / 4000

How Plano Compares

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

Metric Plano Illinois avg Federal benchmark
Total violations 57 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 12,600 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 Plano water safe to drink? ▼
Plano (PWS ID: IL0930200) has 57 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 12,600 people using Groundwater sources.
How many people does Plano serve? ▼
Plano serves 12,600 people in Plano, Illinois. It is a Local-owned system using Groundwater water sources with 4,187 service connections.
What type of violations does Plano have? ▼
Plano has 57 total violations: 0 health-based violations (MCL exceedances or treatment failures), 38 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Plano water? ▼
No. Plano was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Plano use? ▼
Plano 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). 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.