What was found in Eureka Springs's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 762.5 µg/L 19% of the EPA limit 4000 µg/L Highest in the city: CARROLL-BOONE WATER DISTRICT · 20 people · 2019 | 3/7 | SYR4 |
| Copper | 734.25 µg/L 56% of the EPA limit 1300 µg/L Main supplier: EUREKA SPRINGS WATERWORKS · 4,053 people · 2019 | 6/7 | SYR4 |
| Nitrate | 710 µg/L 7.1% of the EPA limit 10000 µg/L Highest in the city: TABLE ROCK LAKE WATER USERS, INC. · 27 people · 2018 | 1/7 | SYR4 |
| Nitrate-Nitrite | 699 µg/L 7% of the EPA limit 10000 µg/L Highest in the city: TABLE ROCK LAKE WATER USERS, INC. · 27 people · 2019 | 6/7 | SYR4 |
| TTHM | 66.335 µg/L 83% of the EPA limit 80 µg/L Main supplier: EUREKA SPRINGS WATERWORKS · 4,053 people · 2019 | 4/7 | SYR4 |
| Chloroform | 60.415 µg/L No EPA limit set Main supplier: EUREKA SPRINGS WATERWORKS · 4,053 people · 2019 | 5/7 | SYR4 |
| Total Haloacetic Acids (HAA5) | 41.385 µg/L 69% of the EPA limit 60 µg/L Main supplier: EUREKA SPRINGS WATERWORKS · 4,053 people · 2019
Highest in the city: 42.615 µg/L — CARROLL-BOONE WATER DISTRICT · 20 people · 2019 | 5/7 | SYR4 |
| Trichloroacetic Acid | 22.455 µg/L No EPA limit set Main supplier: EUREKA SPRINGS WATERWORKS · 4,053 people · 2019 | 4/7 | SYR4 |
| Dichloroacetic Acid | 20.065 µg/L No EPA limit set Main supplier: EUREKA SPRINGS WATERWORKS · 4,053 people · 2019
Highest in the city: 22.03 µg/L — CARROLL-BOONE WATER DISTRICT · 20 people · 2019 | 5/7 | SYR4 |
| Lead | 19.35 µg/L 129% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: EUREKA SPRINGS WATERWORKS · 4,053 people · 2019 | 5/7 | SYR4 |
| Monochloroacetic Acid | 12.735 µg/L No EPA limit set Main supplier: EUREKA SPRINGS WATERWORKS · 4,053 people · 2019 | 3/7 | SYR4 |
| Bromodichloromethane | 7.91 µg/L No EPA limit set Main supplier: EUREKA SPRINGS WATERWORKS · 4,053 people · 2019 | 4/7 | SYR4 |
| Gross Beta Particle Activity | 6.6 pCi/L No EPA limit set Highest in the city: SYLVAN SHORES SD WATERWORKS · 65 people · 2019 | 2/7 | SYR4 |
| Toluene | 5.965 µg/L 0.6% of the EPA limit 1000 µg/L Highest in the city: MUNDELL HEIGHTS WATERWORKS · 203 people · 2019 | 2/7 | SYR4 |
| Dibromochloromethane | 1.2 µg/L No EPA limit set Main supplier: EUREKA SPRINGS WATERWORKS · 4,053 people · 2019
Highest in the city: 5.5 µg/L — MUNDELL HEIGHTS WATERWORKS · 203 people · 2019 | 7/7 | SYR4 |
| Xylenes, Total | 4.033 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: SYLVAN SHORES SD WATERWORKS · 65 people · 2019 | 1/7 | SYR4 |
| Monobromoacetic Acid | 2.16 µg/L No EPA limit set Main supplier: EUREKA SPRINGS WATERWORKS · 4,053 people · 2019
Highest in the city: 3.74 µg/L — CARROLL-BOONE WATER DISTRICT · 20 people · 2019 | 3/7 | SYR4 |
| Bromoform | 2.8 µg/L No EPA limit set Highest in the city: MUNDELL HEIGHTS WATERWORKS · 203 people · 2019 | 1/7 | SYR4 |
| Dibromoacetic Acid | 1.095 µg/L No EPA limit set Main supplier: EUREKA SPRINGS WATERWORKS · 4,053 people · 2019
Highest in the city: 2.36 µg/L — MUNDELL HEIGHTS WATERWORKS · 203 people · 2019 | 3/7 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.49 µg/L 25% of the EPA limit 6 µg/L Highest in the city: SYLVAN SHORES SD WATERWORKS · 65 people · 2019 | 3/7 | SYR4 |
| Ethylbenzene | 1.064 µg/L 0.2% of the EPA limit 700 µg/L Highest in the city: SYLVAN SHORES SD WATERWORKS · 65 people · 2019 | 1/7 | SYR4 |
| Lead | 0.0070 mg/L 47% of the EPA limit 0.0150 mg/L Main supplier: EUREKA SPRINGS WATERWORKS · 4,053 people · 2025 | 6/7 | LCR |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Eureka Springs
| Supplier | Population served |
|---|---|
| EUREKA SPRINGS WATERWORKS | 4,053 |
| BLUEBIRD WATER, LLC | 205 |
| MUNDELL HEIGHTS WATERWORKS | 203 |
| SYLVAN SHORES SD WATERWORKS | 65 |
| LAKE LUCERNE ESTATES | 65 |
| TABLE ROCK LAKE WATER USERS, INC. | 27 |
| CARROLL-BOONE WATER DISTRICT | 20 |
Frequently asked questions about Eureka Springs tap water
Is Eureka Springs tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Eureka Springs. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Eureka Springs?
7 public water suppliers report drinking-water monitoring for Eureka Springs, Arkansas to the EPA. Each is listed above with its population served.
What contaminants are in Eureka Springs's water?
The contaminants EPA monitoring detected in Eureka Springs include Fluoride, Copper, Nitrate, Nitrate-Nitrite, TTHM. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.