What was found in ZIP 80104
The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 1100 µg/L 28% of the EPA limit 4000 µg/L | 1/1 | SYR4 |
| Barium | 520 µg/L 26% of the EPA limit 2000 µg/L | 1/1 | SYR4 |
| Nitrate | 350 µg/L 3.5% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Nitrate-Nitrite | 350 µg/L 3.5% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| TTHM | 67.49 µg/L 84% of the EPA limit 80 µg/L | 1/1 | SYR4 |
| Xylenes, Total | 27.5 µg/L 0.3% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Lithium | 25 µg/L No EPA limit set | 1/1 | UCMR-5 |
| Dibromochloromethane | 14.1 µg/L No EPA limit set | 1/1 | SYR4 |
| Bromodichloromethane | 9.3 µg/L No EPA limit set | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 9.3 µg/L 16% of the EPA limit 60 µg/L | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 7.63 pCi/L 51% of the EPA limit 15 pCi/L | 1/1 | SYR4 |
| Bromoform | 7.49 µg/L No EPA limit set | 1/1 | SYR4 |
| Gross Beta Particle Activity | 7 pCi/L No EPA limit set | 1/1 | SYR4 |
| Chloroform | 5.3 µg/L No EPA limit set | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 5.2 pCi/L 104% of the EPA limit, in the worst sample — 5 pCi/L | 1/1 | SYR4 |
| Selenium | 5 µg/L 10% of the EPA limit 50 µg/L | 1/1 | SYR4 |
| Dibromoacetic Acid | 4.6 µg/L No EPA limit set | 1/1 | SYR4 |
| Dichloroacetic Acid | 4.5 µg/L No EPA limit set | 1/1 | SYR4 |
| Chromium | 3 µg/L 3% of the EPA limit 100 µg/L | 1/1 | SYR4 |
| Combined Uranium | 3 µg/L 10% of the EPA limit 30 µg/L | 1/1 | SYR4 |
| Ethylbenzene | 2.3 µg/L 0.3% of the EPA limit 700 µg/L | 1/1 | SYR4 |
| Monobromoacetic Acid | 2.2 µg/L No EPA limit set | 1/1 | SYR4 |
| Thallium, Total | 2 µg/L 100% of the EPA limit 2 µg/L | 1/1 | SYR4 |
| Arsenic | 1.9 µg/L 19% of the EPA limit 10 µg/L | 1/1 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.9 µg/L 32% of the EPA limit 6 µg/L | 1/1 | SYR4 |
| Trichloroacetic Acid | 1.3 µg/L No EPA limit set | 1/1 | SYR4 |
| Picloram | 0.1000 µg/L 0% of the EPA limit 500 µg/L | 1/1 | SYR4 |
| Pfba | 0.0051 µg/L No EPA limit set | 1/1 | UCMR-5 |
| Pfpea | 0.0047 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 |
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 single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
Water suppliers serving ZIP 80104
| Supplier | State | Population served |
|---|---|---|
| CASTLE ROCK TOWN OF | CO | 110,298 |
Frequently asked questions about ZIP 80104 tap water
Is the tap water in ZIP 80104 safe to drink?
EPA testing detected 30 contaminants across the water suppliers serving ZIP 80104. 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 80104?
1 public water supplier report EPA drinking-water monitoring for ZIP 80104. Each is listed above with its population served.
What contaminants are in ZIP 80104's water?
EPA monitoring detected Fluoride, Barium, Nitrate, Nitrate-Nitrite, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.