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EL DORADO, CITY OF

PWS ID: KS2001511 · EL DORADO, Kansas 67042

EL DORADO, CITY OF serves 12,810 people in EL DORADO, Kansas using Surface Water water sources. It has 123 recorded EPA violations, including 79 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: EL DORADO, CITY OF

EL DORADO, CITY OF is a local-owned community water system that delivers drinking water to 12,810 residents in EL DORADO, Kansas (Butler County) through 5,251 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 123 total violations for this system , of which 79 (64%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 40 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 CARBON, TOTAL, recorded in 71 violations (TT, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Kansas, EPA tracks 957 public water systems serving 2,894,673 people, with 84,344 cumulative violations and 33,424 health-based violations on record. About 99% of systems in the state carry at least one violation, and state-wide the average per system is 88.1 violations. EL DORADO, CITY OF's 123 violations sit above the Kansas average. Statewide, 89 of 103 UCMR5-tested systems have reported PFAS detections (86.4%). 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
12,810
Total Violations
123
Health-Based Violations
79
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
5,251
County
Butler
School/Daycare
No
MCL Violations
0
Monitoring Violations
40
Treatment Tech Violations
79

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
CARBON, TOTAL TT 71 2020
Surface Water Treatment Rule MR 16 2020
CARBON, TOTAL MR 11 2019
Surface Water Treatment Rule TT 8 2000
Interim Enhanced Surface Water Treatment Rule MR 8 2020
Lead and Copper Rule MR 5 1993
Public Notice Other 2 2020

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
PFTA 8/7/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFEESA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 8/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
NFDHA 8/7/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 8/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 8/7/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFTrDA 8/7/2023 <0.007 µg/L 0.007 µg/L Not Detected
lithium 8/7/2023 <9 µg/L 9 µg/L Not Detected
HFPO-DA 8/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 8/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHxS 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 8/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 8/7/2023 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 8/7/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFBS 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 4/1/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 4/1/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMBA 4/1/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 4/1/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFHpS 4/1/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 4/1/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 4/1/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 4/1/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 4/1/2024 <9 µg/L 9 µg/L Not Detected
PFOS 4/1/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 4/1/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 4/1/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 4/1/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFPeA 4/1/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 4/1/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 4/1/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 4/1/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 4/1/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 4/1/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 4/1/2024 <0.005 µg/L 0.005 µg/L 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 EL DORADO, CITY OF.

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 KS2001511 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Kansas Drinking Water Authority

Kansas's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find KS regulator via EPA SDWIS

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 CARBON, TOTAL TT 71 SDWIS / KS2001511 / 2920
2020 Surface Water Treatment Rule MR 16 SDWIS / KS2001511 / 0200
2020 Interim Enhanced Surface Water Treatment Rule MR 8 SDWIS / KS2001511 / 0300
2020 Public Notice Other 2 SDWIS / KS2001511 / 7500
2019 CARBON, TOTAL MR 11 SDWIS / KS2001511 / 2920
2000 Surface Water Treatment Rule TT 8 SDWIS / KS2001511 / 0200
1993 Lead and Copper Rule MR 5 SDWIS / KS2001511 / 5000

How EL DORADO, CITY OF Compares

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

Metric EL DORADO, CITY OF Kansas avg Federal benchmark
Total violations 123 88.1 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 79 34.9 Indicates a contaminant exceeded a federal MCL
PFAS detection None 86.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 12,810 3,025 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 957 regulated public water systems in Kansas.

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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is EL DORADO, CITY OF water safe to drink? ▼
EL DORADO, CITY OF (PWS ID: KS2001511) has 123 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 12,810 people using Surface Water sources.
How many people does EL DORADO, CITY OF serve? ▼
EL DORADO, CITY OF serves 12,810 people in EL DORADO, Kansas. It is a Local-owned system using Surface Water water sources with 5,251 service connections.
What type of violations does EL DORADO, CITY OF have? ▼
EL DORADO, CITY OF has 123 total violations: 79 health-based violations (MCL exceedances or treatment failures), 40 monitoring/reporting violations, and 79 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in EL DORADO, CITY OF water? ▼
No. EL DORADO, CITY OF was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does EL DORADO, CITY OF use? ▼
EL DORADO, CITY OF uses Surface Water 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.

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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.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial