El Dorado Water Quality
Arkansas
According to EPA SDWIS, El Dorado, Arkansas is served by 13 community water systems covering about 27,879 people. The same extract lists 84 health-based violation records, most recently coded 2950 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in El Dorado, Arkansas is delivered through 13 EPA-regulated community water systems serving an estimated 27,879 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 84 violation records across the 13 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 5 distinct EPA contaminant codes: TTHM, Revised Total Coliform Rule, Asbestos, Stage 1 Disinfectants and Disinfection Byproducts Rule, Coliform (TCR). 15 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Arkansas drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| EL DORADO WATERWORKS | 17,932 | 7 | Health |
| PARKERS CHAPEL PUBLIC WATER | 2,391 | 2 | Health |
| WILDWOOD WATER ASSOCIATION | 1,350 | 2 | Health |
| FAIRCREST WATER ASSOCIATION | 1,329 | 6 | Health |
| OLD UNION PUBLIC WATER AUTHORITY | 1,200 | 12 | Health |
| LAWSON-URBANA WATER ASSOC | 1,108 | 4 | Health |
| WESSON-NEWELL WATER ASSOC | 658 | 0 | Clean |
| LISBON WATER ASSOCIATION | 439 | 0 | Clean |
| MOUNT HOLLY WATERWORKS | 384 | 0 | Clean |
| OAK MANOR WATER ASSOCIATION | 338 | 0 | Clean |
| HARMONY WATER ASSOCIATION | 336 | 33 | Health |
| BANKS WATERWORKS | 244 | 18 | Health |
| LOUANN WATERWORKS | 170 | 0 | Clean |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| EL DORADO WATERWORKS | TTHM | 2025-07-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2025-07-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2025-07-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2025-04-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2025-04-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2025-04-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2025-04-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2025-01-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2025-01-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2025-01-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2025-01-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2024-10-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2024-10-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2024-10-01 |
| OLD UNION PUBLIC WATER AUTHORITY | Revised Total Coliform Rule | 2022-10-01 |
| OLD UNION PUBLIC WATER AUTHORITY | Revised Total Coliform Rule | 2022-10-01 |
| OLD UNION PUBLIC WATER AUTHORITY | Revised Total Coliform Rule | 2022-10-01 |
| OLD UNION PUBLIC WATER AUTHORITY | Revised Total Coliform Rule | 2022-10-01 |
| WILDWOOD WATER ASSOCIATION | TTHM | 2021-04-01 |
| WILDWOOD WATER ASSOCIATION | TTHM | 2021-04-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2021-04-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2021-04-01 |
| EL DORADO WATERWORKS | Asbestos | 2021-01-01 |
| EL DORADO WATERWORKS | Asbestos | 2021-01-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2021-01-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2021-01-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2021-01-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2021-01-01 |
| EL DORADO WATERWORKS | Asbestos | 2020-10-01 |
| EL DORADO WATERWORKS | Asbestos | 2020-10-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2020-10-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2020-10-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2020-10-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2020-10-01 |
| EL DORADO WATERWORKS | Asbestos | 2020-07-01 |
| EL DORADO WATERWORKS | Asbestos | 2020-07-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2020-07-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2020-07-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2020-07-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2020-07-01 |
| OLD UNION PUBLIC WATER AUTHORITY | TTHM | 2019-01-01 |
| OLD UNION PUBLIC WATER AUTHORITY | TTHM | 2019-01-01 |
| OLD UNION PUBLIC WATER AUTHORITY | TTHM | 2018-04-01 |
| OLD UNION PUBLIC WATER AUTHORITY | TTHM | 2018-04-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2018-04-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2018-04-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2017-10-01 |
| HARMONY WATER ASSOCIATION | TTHM | 2017-10-01 |
| FAIRCREST WATER ASSOCIATION | TTHM | 2017-10-01 |
| FAIRCREST WATER ASSOCIATION | TTHM | 2017-10-01 |
What are El Dorado's health-based records for?
El Dorado's health-based violation records carry 5 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Tthm | 54 | 6 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 16 | 1 |
| Asbestos | 6 | 1 |
| Coliform (TCR) | 4 | 2 |
| Revised Total Coliform Rule | 4 | 1 |
TRI Facilities in El Dorado
| Facility | Total Releases |
|---|---|
| Clean Harbors el Dorado LLC | 16.6M lbs |
| Lsb Chemical L.l.c | 4.2M lbs |
| Lanxess - Central | 3.4M lbs |
| Lanxess - South Plant | 2.1M lbs |
| Lion Oil Co | 2.0M lbs |
| Lycus Ltd | 389.0K lbs |
| Roseburg Forest Products - el Dorado Mdf | 247.8K lbs |
| Anthony Forest Products Co Urbana | 120.0K lbs |
| Prescolite Inc. | 104.1K lbs |
| Chemours el Dorado | 61.7K lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in El Dorado, Arkansas? ▼
How many water violations does El Dorado have in this EPA extract? ▼
What contaminants were found in El Dorado water? ▼
How many water systems serve El Dorado? ▼
Where does El Dorado get its drinking water? ▼
Are there pollution sources near El Dorado? ▼
How does El Dorado compare in Arkansas?
Of the 395 Arkansas places with at least one community water system on file, El Dorado ranks #2 by number of systems (13).
Either side of it: El Dorado (14), Batesville (9), Eureka Springs (7)
About This Data
Figures here are the current EPA SDWIS extract joined to the 13 community water systems whose service area lists El Dorado, ranked against the 395 Arkansas places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.