States ›Arkansas ›Union County ›El Dorado

El Dorado, AR Tap Water Quality 2026

Water quality report for El Dorado, AR — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at El Dorado's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: El Dorado Waterworks PWSID: AR0000550 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 2.00 ppb, 13% of the action level and no violations are open. No PFAS was detected.

B

El Dorado earns a B for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 2.00 ppb — 13% of the federal action level
PFAS tested, none detected
6 violations since 2015, 5 health-based
No violations currently open
El Dorado's lead level vs. all Arkansas community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 2.00 ppb — 13% of the federal action level
✓ Lower lead than 57% of Arkansas utilities
Population Served
17742
~8333 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
6 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
13% of EPA action level
2.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 2.00 ppb, 13% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
TTHM MCL EXCEEDANCE 84 UG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 81 UG/L 0.080 mg/L 2025 Archived
Revised Total Coliform Rule MONITORING FAILURE — — 2022 Resolved
Asbestos MCL EXCEEDANCE 9.8 MFL 7 MFL 2021 Resolved
Asbestos MCL EXCEEDANCE 45 MFL 7 MFL 2020 Resolved
Asbestos MCL EXCEEDANCE 45 MFL 7 MFL 2020 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

6 violations are on record since 2015, of which 5 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility El Dorado Waterworks
PWSID AR0000550
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 17,742
Service connections 8,333
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is El Dorado tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 2.00 ppb, 13% of the action level.
Does El Dorado water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to El Dorado? ▼
El Dorado Waterworks (PWSID AR0000550). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2024-03-13. No significant deficiencies were recorded.

What Should El Dorado Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

Nearby Cities in Arkansas

Smackover, Ar Tap Water Quality 2026 Union Norphlet, Ar Tap Water Quality 2026 Union Junction City, Ar Tap Water Quality 2026 Union Huttig, Ar Tap Water Quality 2026 Union Strong, Ar Tap Water Quality 2026 Union Calion, Ar Tap Water Quality 2026 Union