What was found in ZIP 80129
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 803 µg/L 20% of the EPA limit 4000 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 1020 µg/L — HIGHLANDS RANCH WSD · 103,444 people · 2019 | 2/3 | SYR4 |
| Nitrate-Nitrite | 252 µg/L 2.5% of the EPA limit 10000 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 2/3 | SYR4 |
| Nitrate | 250 µg/L 2.5% of the EPA limit 10000 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 2/3 | SYR4 |
| Barium | 43.51 µg/L 2.2% of the EPA limit 2000 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 110 µg/L — HIGHLANDS RANCH WSD · 103,444 people · 2019 | 2/3 | SYR4 |
| TTHM | 32.59 µg/L 41% of the EPA limit 80 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 51.06 µg/L — HIGHLANDS RANCH WSD · 103,444 people · 2019 | 3/3 | SYR4 |
| Lithium | 10.8 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2025
Highest in the ZIP: 35.2 µg/L — HIGHLANDS RANCH WSD · 103,444 people · 2024 | 3/3 | UCMR-5 |
| Cyanide | 24.85 µg/L 12% of the EPA limit 200 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2015 | 1/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 23 µg/L 38% of the EPA limit 60 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 3.9 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 21.995 µg/L — HIGHLANDS RANCH WSD · 103,444 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 8.9 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 21.745 µg/L — HIGHLANDS RANCH WSD · 103,444 people · 2019 | 3/3 | SYR4 |
| Chloroform | 20.265 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 12.8 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 3/3 | SYR4 |
| Bromoform | 0.8350 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 10.165 µg/L — HIGHLANDS RANCH WSD · 103,444 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 6.855 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 3 pCi/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2018
Highest in the ZIP: 6.25 pCi/L — HIGHLANDS RANCH WSD · 103,444 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 1.4 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 5.7775 µg/L — HIGHLANDS RANCH WSD · 103,444 people · 2019 | 3/3 | SYR4 |
| Combined Uranium | 5.775 µg/L 19% of the EPA limit 30 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 2/3 | SYR4 |
| Selenium | 5.44 µg/L 11% of the EPA limit 50 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 2/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2 pCi/L 13% of the EPA limit 15 pCi/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2018
Highest in the ZIP: 4.9 pCi/L — HIGHLANDS RANCH WSD · 103,444 people · 2019 | 2/3 | SYR4 |
| Monochloroacetic Acid | 2.9 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 4.535 µg/L — NORTHERN DOUGLAS COUNTY WSD · 6,160 people · 2019 | 2/3 | SYR4 |
| Arsenic | 1.14 µg/L 11% of the EPA limit 10 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 3.5 µg/L — HIGHLANDS RANCH WSD · 103,444 people · 2019 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.95 pCi/L 39% of the EPA limit 5 pCi/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2014
Highest in the ZIP: 3.45 pCi/L — HIGHLANDS RANCH WSD · 103,444 people · 2019 | 2/3 | SYR4 |
| Monobromoacetic Acid | 2.82 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 3.27 µg/L — NORTHERN DOUGLAS COUNTY WSD · 6,160 people · 2019 | 3/3 | SYR4 |
| Chromium | 1.7 µg/L 1.7% of the EPA limit 100 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 2 µg/L — HIGHLANDS RANCH WSD · 103,444 people · 2019 | 2/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.9 µg/L 32% of the EPA limit 6 µg/L Highest in the ZIP: HIGHLANDS RANCH WSD · 103,444 people · 2019 | 1/3 | SYR4 |
| Carbon Tetrachloride | 0.4930 µg/L 9.9% of the EPA limit 5 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 1/3 | SYR4 |
| Antimony, Total | 0.2285 µg/L 3.8% of the EPA limit 6 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 1/3 | SYR4 |
| Mercury | 0.0700 µg/L 3.5% of the EPA limit 2 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 0.2000 µg/L — HIGHLANDS RANCH WSD · 103,444 people · 2019 | 2/3 | SYR4 |
| Cadmium | 0.0960 µg/L 1.9% of the EPA limit 5 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 0.1600 µg/L — HIGHLANDS RANCH WSD · 103,444 people · 2019 | 2/3 | SYR4 |
| Hexachlorocyclopentadiene | 0.1300 µg/L 0.3% of the EPA limit 50 µg/L Highest in the ZIP: HIGHLANDS RANCH WSD · 103,444 people · 2019 | 1/3 | SYR4 |
| 2,4-D | 0.1000 µg/L 0.1% of the EPA limit 70 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 1/3 | SYR4 |
| Beryllium, Total | 0.0600 µg/L 1.5% of the EPA limit 4 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 1/3 | SYR4 |
| Thallium, Total | 0.0600 µg/L 3% of the EPA limit 2 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 1/3 | SYR4 |
| Pfba | 0.0087 µg/L No EPA limit set Highest in the ZIP: HIGHLANDS RANCH WSD · 103,444 people · 2024 | 2/3 | UCMR-5 |
| Pfpea | 0.0057 µg/L No EPA limit set Highest in the ZIP: HIGHLANDS RANCH WSD · 103,444 people · 2024 | 2/3 | UCMR-5 |
| PFBS | 0.0053 µg/L No EPA limit set Highest in the ZIP: NORTHERN DOUGLAS COUNTY WSD · 6,160 people · 2024 | 2/3 | UCMR-5 |
| Pfhxa | 0.0053 µg/L No EPA limit set Highest in the ZIP: NORTHERN DOUGLAS COUNTY WSD · 6,160 people · 2024 | 2/3 | UCMR-5 |
| Lead | 0.0031 mg/L 21% of the EPA limit 0.0150 mg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2025 | 3/3 | 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.
Water suppliers serving ZIP 80129
| Supplier | State | Population served |
|---|---|---|
| DENVER WATER BOARD | CO | 1,287,000 |
| HIGHLANDS RANCH WSD | CO | 103,444 |
| NORTHERN DOUGLAS COUNTY WSD | CO | 6,160 |
Frequently asked questions about ZIP 80129 tap water
Is the tap water in ZIP 80129 safe to drink?
EPA testing detected 38 contaminants across the water suppliers serving ZIP 80129. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 80129?
3 public water suppliers report EPA drinking-water monitoring for ZIP 80129. Each is listed above with its population served.
What contaminants are in ZIP 80129's water?
EPA monitoring detected Fluoride, Nitrate-Nitrite, Nitrate, Barium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.