What was found in Highlands Ranch's water
The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 1070 µg/L 27% of the EPA limit 4000 µg/L | 1/1 | SYR4 |
| Nitrate | 200 µg/L 2% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Nitrate-Nitrite | 200 µg/L 2% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Barium | 130 µg/L 6.5% of the EPA limit 2000 µg/L | 1/1 | SYR4 |
| TTHM | 60.3 µg/L 75% of the EPA limit 80 µg/L | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 40.1 µg/L 67% of the EPA limit 60 µg/L | 1/1 | SYR4 |
| Lithium | 35.2 µg/L No EPA limit set | 1/1 | UCMR-5 |
| Dibromochloromethane | 23.8 µg/L No EPA limit set | 1/1 | SYR4 |
| Bromodichloromethane | 22.2 µg/L No EPA limit set | 1/1 | SYR4 |
| Chloroform | 11.3 µg/L No EPA limit set | 1/1 | SYR4 |
| Bromoform | 11.1 µg/L No EPA limit set | 1/1 | SYR4 |
| Dichloroacetic Acid | 10.11 µg/L No EPA limit set | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 9 pCi/L 60% of the EPA limit 15 pCi/L | 1/1 | SYR4 |
| Gross Beta Particle Activity | 8.2 pCi/L No EPA limit set | 1/1 | SYR4 |
| Combined Uranium | 7.8 µg/L 26% of the EPA limit 30 µg/L | 1/1 | SYR4 |
| Dibromoacetic Acid | 5.8 µg/L No EPA limit set | 1/1 | SYR4 |
| Arsenic | 5 µg/L 50% of the EPA limit 10 µg/L | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 4.6 pCi/L 92% of the EPA limit 5 pCi/L | 1/1 | SYR4 |
| Trichloroacetic Acid | 4.19 µg/L No EPA limit set | 1/1 | SYR4 |
| Selenium | 3 µg/L 6% of the EPA limit 50 µg/L | 1/1 | SYR4 |
| Chromium | 2 µg/L 2% of the EPA limit 100 µg/L | 1/1 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.9 µg/L 32% of the EPA limit 6 µg/L | 1/1 | SYR4 |
| Monobromoacetic Acid | 1.5 µg/L No EPA limit set | 1/1 | SYR4 |
| Mercury | 0.2000 µg/L 10% of the EPA limit 2 µg/L | 1/1 | SYR4 |
| Cadmium | 0.1600 µg/L 3.2% of the EPA limit 5 µg/L | 1/1 | SYR4 |
| Hexachlorocyclopentadiene | 0.1300 µg/L 0.3% of the EPA limit 50 µg/L | 1/1 | SYR4 |
| Pfba | 0.0087 µg/L No EPA limit set | 1/1 | UCMR-5 |
| Pfpea | 0.0057 µg/L No EPA limit set | 1/1 | UCMR-5 |
| Pfhxa | 0.0051 µg/L No EPA limit set | 1/1 | UCMR-5 |
| PFBS | 0.0050 µg/L No EPA limit set | 1/1 | UCMR-5 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L | 1/1 | LCR |
Water suppliers serving Highlands Ranch
| Supplier | Population served |
|---|---|
| HIGHLANDS RANCH WSD | 103,444 |
Frequently asked questions about Highlands Ranch tap water
Is Highlands Ranch tap water safe to drink?
EPA testing detected 31 contaminants in the water serving Highlands Ranch. 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 Highlands Ranch?
1 public water supplier report drinking-water monitoring for Highlands Ranch, Colorado to the EPA. Each is listed above with its population served.
What contaminants are in Highlands Ranch's water?
The contaminants EPA monitoring detected in Highlands Ranch include Fluoride, Nitrate, Nitrate-Nitrite, Barium, TTHM. The full list, with the highest level found 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.