What was found in ZIP 80108
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 | 988 µg/L 25% of the EPA limit 4000 µg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 1648.2 µg/L — PARKER WSD · 75,949 people · 2019 | 4/4 | SYR4 |
| Nitrate | 300 µg/L 3% of the EPA limit 10000 µg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 775 µg/L — CASTLE PINES VILLAGE MD · 5,656 people · 2019 | 4/4 | SYR4 |
| Nitrate-Nitrite | 310 µg/L 3.1% of the EPA limit 10000 µg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 645.65 µg/L — PARKER WSD · 75,949 people · 2019 | 3/4 | SYR4 |
| Chlorite | 296.5 µg/L 30% of the EPA limit 1000 µg/L Highest in the ZIP: PARKER WSD · 75,949 people · 2019 | 1/4 | SYR4 |
| Barium | 248.8 µg/L 12% of the EPA limit 2000 µg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019 | 4/4 | SYR4 |
| Nitrite | 57 µg/L 5.7% of the EPA limit 1000 µg/L Highest in the ZIP: PARKER WSD · 75,949 people · 2019 | 1/4 | SYR4 |
| TTHM | 18.39 µg/L 23% of the EPA limit 80 µg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 32.92 µg/L — PARKER WSD · 75,949 people · 2019 | 3/4 | SYR4 |
| Lithium | 25 µg/L No EPA limit set Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2024
Highest in the ZIP: 30.9 µg/L — CASTLE PINES VILLAGE MD · 5,656 people · 2025 | 4/4 | UCMR-5 |
| Xylenes, Total | 26.315 µg/L 0.3% of the EPA limit 10000 µg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019 | 1/4 | SYR4 |
| Dibromochloromethane | 10.9195 µg/L No EPA limit set Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 14 µg/L — PARKER WSD · 75,949 people · 2019 | 3/4 | SYR4 |
| Combined Uranium | 2.65 µg/L 8.8% of the EPA limit 30 µg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 11.65 µg/L — PARKER WSD · 75,949 people · 2019 | 2/4 | SYR4 |
| Bromodichloromethane | 6.335 µg/L No EPA limit set Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 10 µg/L — PARKER WSD · 75,949 people · 2019 | 3/4 | SYR4 |
| Gross Beta Particle Activity | 7 pCi/L No EPA limit set Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2018
Highest in the ZIP: 9.99 pCi/L — PARKER WSD · 75,949 people · 2019 | 2/4 | SYR4 |
| Di(2-ethylhexyl) Adipate | 9.725 µg/L 2.4% of the EPA limit 400 µg/L Highest in the ZIP: PARKER WSD · 75,949 people · 2019 | 1/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 7.81 µg/L 13% of the EPA limit 60 µg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 9.475 µg/L — PARKER WSD · 75,949 people · 2019 | 3/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 7.02 pCi/L 47% of the EPA limit 15 pCi/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019 | 3/4 | SYR4 |
| Bromoform | 6.3 µg/L No EPA limit set Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 6.63 µg/L — PARKER WSD · 75,949 people · 2019 | 2/4 | SYR4 |
| Dibromoacetic Acid | 4.32 µg/L No EPA limit set Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 6.2 µg/L — PARKER WSD · 75,949 people · 2019 | 2/4 | SYR4 |
| Chloroform | 2.405 µg/L No EPA limit set Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 5.7 µg/L — PARKER WSD · 75,949 people · 2019 | 3/4 | SYR4 |
| Combined Radium (-226 And -228) | 4.52 pCi/L 90% of the EPA limit 5 pCi/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 4.665 pCi/L — PARKER WSD · 75,949 people · 2019 | 3/4 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.9 µg/L 32% of the EPA limit 6 µg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 4.6 µg/L — PARKER WSD · 75,949 people · 2019 | 3/4 | SYR4 |
| Selenium | 4.5 µg/L 9% of the EPA limit 50 µg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019 | 3/4 | SYR4 |
| Dichloroacetic Acid | 2.78 µg/L No EPA limit set Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 3.9 µg/L — PARKER WSD · 75,949 people · 2019 | 2/4 | SYR4 |
| Chromium | 2.7 µg/L 2.7% of the EPA limit 100 µg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019 | 2/4 | SYR4 |
| Trichloroacetic Acid | 1.3 µg/L No EPA limit set Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 2.7 µg/L — PARKER WSD · 75,949 people · 2019 | 2/4 | SYR4 |
| Ethylbenzene | 2.3 µg/L 0.3% of the EPA limit 700 µg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019 | 1/4 | SYR4 |
| Monobromoacetic Acid | 2.16 µg/L No EPA limit set Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019 | 2/4 | SYR4 |
| Arsenic | 1.9 µg/L 19% of the EPA limit 10 µg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019
Highest in the ZIP: 2 µg/L — PARKER WSD · 75,949 people · 2019 | 2/4 | SYR4 |
| Thallium, Total | 2 µg/L 100% of the EPA limit 2 µg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019 | 1/4 | SYR4 |
| Picloram | 0.1000 µg/L 0% of the EPA limit 500 µg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2019 | 1/4 | SYR4 |
| Pfpea | 0.0047 µg/L No EPA limit set Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2024
Highest in the ZIP: 0.0140 µg/L — PARKER WSD · 75,949 people · 2025 | 3/4 | UCMR-5 |
| Pfhxa | 0.0119 µg/L No EPA limit set Highest in the ZIP: PARKER WSD · 75,949 people · 2025 | 2/4 | UCMR-5 |
| Pfba | 0.0051 µg/L No EPA limit set Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2024
Highest in the ZIP: 0.0086 µg/L — PARKER WSD · 75,949 people · 2025 | 3/4 | UCMR-5 |
| PFOA | 0.0048 µg/L No EPA limit set Highest in the ZIP: PARKER WSD · 75,949 people · 2025 | 1/4 | UCMR-5 |
| PFBS | 0.0046 µg/L No EPA limit set Highest in the ZIP: PARKER WSD · 75,949 people · 2025 | 2/4 | UCMR-5 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: CASTLE ROCK TOWN OF · 110,298 people · 2025 | 4/4 | 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 80108
| Supplier | State | Population served |
|---|---|---|
| CASTLE ROCK TOWN OF | CO | 110,298 |
| PARKER WSD | CO | 75,949 |
| CASTLE PINES NORTH MD | CO | 12,800 |
| CASTLE PINES VILLAGE MD | CO | 5,656 |
Frequently asked questions about ZIP 80108 tap water
Is the tap water in ZIP 80108 safe to drink?
EPA testing detected 36 contaminants across the water suppliers serving ZIP 80108. 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 80108?
4 public water suppliers report EPA drinking-water monitoring for ZIP 80108. Each is listed above with its population served.
What contaminants are in ZIP 80108's water?
EPA monitoring detected Fluoride, Nitrate, Nitrate-Nitrite, Chlorite, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.