What was found in ZIP 80301
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 | 810 µg/L 20% of the EPA limit 4000 µg/L Main supplier: BOULDER CITY OF · 166,080 people · 2019
Highest in the ZIP: 934.5 µg/L — LEFT HAND WD · 20,280 people · 2019 | 2/2 | SYR4 |
| Nitrate | 150 µg/L 1.5% of the EPA limit 10000 µg/L Main supplier: BOULDER CITY OF · 166,080 people · 2019
Highest in the ZIP: 240 µg/L — LEFT HAND WD · 20,280 people · 2019 | 2/2 | SYR4 |
| TTHM | 58.575 µg/L 73% of the EPA limit 80 µg/L Main supplier: BOULDER CITY OF · 166,080 people · 2019
Highest in the ZIP: 87.53 µg/L — LEFT HAND WD · 20,280 people · 2019 | 2/2 | SYR4 |
| Chloroform | 29.71 µg/L No EPA limit set Main supplier: BOULDER CITY OF · 166,080 people · 2019
Highest in the ZIP: 71.11 µg/L — LEFT HAND WD · 20,280 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 65.05 µg/L 108% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: BOULDER CITY OF · 166,080 people · 2019 | 2/2 | SYR4 |
| Barium | 22.35 µg/L 1.1% of the EPA limit 2000 µg/L Main supplier: BOULDER CITY OF · 166,080 people · 2019
Highest in the ZIP: 50.25 µg/L — LEFT HAND WD · 20,280 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 21.175 µg/L 0.2% of the EPA limit 10000 µg/L Highest in the ZIP: LEFT HAND WD · 20,280 people · 2012 | 1/2 | SYR4 |
| Trichloroacetic Acid | 13.925 µg/L No EPA limit set Main supplier: BOULDER CITY OF · 166,080 people · 2019
Highest in the ZIP: 19.929 µg/L — LEFT HAND WD · 20,280 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 11.575 µg/L No EPA limit set Main supplier: BOULDER CITY OF · 166,080 people · 2019
Highest in the ZIP: 18.8 µg/L — LEFT HAND WD · 20,280 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 4.5035 µg/L No EPA limit set Main supplier: BOULDER CITY OF · 166,080 people · 2019
Highest in the ZIP: 12.51 µg/L — LEFT HAND WD · 20,280 people · 2019 | 2/2 | SYR4 |
| Nitrite | 8.11 µg/L 0.8% of the EPA limit 1000 µg/L Highest in the ZIP: LEFT HAND WD · 20,280 people · 2013 | 1/2 | SYR4 |
| Xylenes, Total | 4.965 µg/L 0% of the EPA limit 10000 µg/L Highest in the ZIP: LEFT HAND WD · 20,280 people · 2019 | 1/2 | SYR4 |
| Tetrachloroethylene | 3.1 µg/L 62% of the EPA limit 5 µg/L Main supplier: BOULDER CITY OF · 166,080 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 2.74 µg/L No EPA limit set Highest in the ZIP: LEFT HAND WD · 20,280 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 0.5896 µg/L No EPA limit set Main supplier: BOULDER CITY OF · 166,080 people · 2019
Highest in the ZIP: 2.61 µg/L — LEFT HAND WD · 20,280 people · 2019 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.285 pCi/L 8.6% of the EPA limit 15 pCi/L Highest in the ZIP: LEFT HAND WD · 20,280 people · 2012 | 1/2 | SYR4 |
| Selenium | 1.1 µg/L 2.2% of the EPA limit 50 µg/L Highest in the ZIP: LEFT HAND WD · 20,280 people · 2019 | 1/2 | SYR4 |
| Chromium | 1 µg/L 1% of the EPA limit 100 µg/L Main supplier: BOULDER CITY OF · 166,080 people · 2019 | 1/2 | SYR4 |
| Ethylbenzene | 0.6100 µg/L 0.1% of the EPA limit 700 µg/L Highest in the ZIP: LEFT HAND WD · 20,280 people · 2019 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 0.2000 pCi/L 4% of the EPA limit 5 pCi/L Highest in the ZIP: LEFT HAND WD · 20,280 people · 2012 | 1/2 | SYR4 |
| Hexachlorocyclopentadiene | 0.1064 µg/L 0.2% of the EPA limit 50 µg/L Highest in the ZIP: LEFT HAND WD · 20,280 people · 2017 | 1/2 | SYR4 |
| Hexachlorobenzene | 0.0150 µg/L 1.5% of the EPA limit 1 µg/L Highest in the ZIP: LEFT HAND WD · 20,280 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: BOULDER CITY OF · 166,080 people · 2025 | 2/2 | 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 80301
| Supplier | State | Population served |
|---|---|---|
| BOULDER CITY OF | CO | 166,080 |
| LEFT HAND WD | CO | 20,280 |
Frequently asked questions about ZIP 80301 tap water
Is the tap water in ZIP 80301 safe to drink?
EPA testing detected 23 contaminants across the water suppliers serving ZIP 80301. 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 80301?
2 public water suppliers report EPA drinking-water monitoring for ZIP 80301. Each is listed above with its population served.
What contaminants are in ZIP 80301's water?
EPA monitoring detected Fluoride, Nitrate, TTHM, Chloroform, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.