What was found in Mountain Home'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 |
|---|---|---|---|
| Nitrate | 1740 µg/L 17% of the EPA limit 10000 µg/L Highest in the city: AUTUMN ACRES MHP · 68 people · 2019 | 2/6 | SYR4 |
| Nitrate-Nitrite | 420 µg/L 4.2% of the EPA limit 10000 µg/L Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019
Highest in the city: 1701.5 µg/L — AUTUMN ACRES MHP · 68 people · 2019 | 4/6 | SYR4 |
| Fluoride | 1019 µg/L 25% of the EPA limit 4000 µg/L Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019 | 1/6 | SYR4 |
| Chlorite | 646.8 µg/L 65% of the EPA limit 1000 µg/L Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019 | 1/6 | SYR4 |
| Copper | 237.4 µg/L 18% of the EPA limit 1300 µg/L Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019
Highest in the city: 449 µg/L — BRIARCLIFF WATERWORKS · 338 people · 2019 | 6/6 | SYR4 |
| TTHM | 76.4 µg/L 96% of the EPA limit 80 µg/L Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019 | 2/6 | SYR4 |
| Chloroform | 65.3 µg/L No EPA limit set Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019 | 3/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 47.86 µg/L 80% of the EPA limit 60 µg/L Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019 | 4/6 | SYR4 |
| Trichloroacetic Acid | 23.05 µg/L No EPA limit set Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019
Highest in the city: 23.225 µg/L — NORTH EAST PUBLIC WATER AUTH · 4,690 people · 2019 | 2/6 | SYR4 |
| Dichloroacetic Acid | 22.55 µg/L No EPA limit set Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019 | 3/6 | SYR4 |
| Lead | 9 µg/L 60% of the EPA limit 15 µg/L Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019
Highest in the city: 19.895 µg/L — TALL OAKS MHP · 22 people · 2019 | 6/6 | SYR4 |
| Selenium | 18.235 µg/L 36% of the EPA limit 50 µg/L Highest in the city: TALL OAKS MHP · 22 people · 2019 | 1/6 | SYR4 |
| Xylenes, Total | 4.4855 µg/L 0% of the EPA limit 10000 µg/L Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019
Highest in the city: 18.08 µg/L — BRIARCLIFF WATERWORKS · 338 people · 2019 | 2/6 | SYR4 |
| Arsenic | 16.1 µg/L 161% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the city: TALL OAKS MHP · 22 people · 2019 | 1/6 | SYR4 |
| Bromodichloromethane | 8.4 µg/L No EPA limit set Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019 | 3/6 | SYR4 |
| Gross Beta Particle Activity | 1.8 pCi/L No EPA limit set Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019
Highest in the city: 7.82 pCi/L — TALL OAKS MHP · 22 people · 2019 | 3/6 | SYR4 |
| Monobromoacetic Acid | 7.14 µg/L No EPA limit set Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019 | 3/6 | SYR4 |
| Monochloroacetic Acid | 6.575 µg/L No EPA limit set Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019 | 2/6 | SYR4 |
| Ethylbenzene | 5.23 µg/L 0.7% of the EPA limit 700 µg/L Highest in the city: BRIARCLIFF WATERWORKS · 338 people · 2019 | 1/6 | SYR4 |
| Dibromochloromethane | 2.1 µg/L No EPA limit set Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019 | 6/6 | SYR4 |
| Antimony, Total | 1.92 µg/L 32% of the EPA limit 6 µg/L Highest in the city: TALL OAKS MHP · 22 people · 2019 | 1/6 | SYR4 |
| Chromium | 1.8 µg/L 1.8% of the EPA limit 100 µg/L Highest in the city: TALL OAKS MHP · 22 people · 2019 | 1/6 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.73 µg/L 29% of the EPA limit 6 µg/L Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019 | 1/6 | SYR4 |
| Dibromoacetic Acid | 1.2 µg/L No EPA limit set Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2019 | 2/6 | SYR4 |
| Thallium, Total | 0.2490 µg/L 12% of the EPA limit 2 µg/L Highest in the city: TALL OAKS MHP · 22 people · 2019 | 1/6 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: MOUNTAIN HOME WATERWORKS · 19,618 people · 2025
Highest in the city: 0.0050 mg/L — TALL OAKS MHP · 22 people · 2004 | 6/6 | 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 Mountain Home
| Supplier | Population served |
|---|---|
| MOUNTAIN HOME WATERWORKS | 19,618 |
| NORTH EAST PUBLIC WATER AUTH | 4,690 |
| BRIARCLIFF WATERWORKS | 338 |
| AUTUMN ACRES MHP | 68 |
| CRESTWOOD MOBILE HOME PARK | 48 |
| TALL OAKS MHP | 22 |
Frequently asked questions about Mountain Home tap water
Is Mountain Home tap water safe to drink?
EPA testing detected 26 contaminants in the water serving Mountain Home. 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 Mountain Home?
6 public water suppliers report drinking-water monitoring for Mountain Home, Arkansas to the EPA. Each is listed above with its population served.
What contaminants are in Mountain Home's water?
The contaminants EPA monitoring detected in Mountain Home include Nitrate, Nitrate-Nitrite, Fluoride, Chlorite, Copper. 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.