What was found in ZIP 80303
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: 1014.5 µg/L — LAFAYETTE CITY OF · 28,700 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 | 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: 85.555 µg/L — LAFAYETTE CITY OF · 28,700 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 75.5 µg/L 0.8% of the EPA limit 10000 µg/L Highest in the ZIP: LAFAYETTE CITY OF · 28,700 people · 2013 | 1/2 | 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: 49.25 µg/L — LAFAYETTE CITY OF · 28,700 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: 45.54 µg/L — LAFAYETTE CITY OF · 28,700 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: 20.82 µg/L — LAFAYETTE CITY OF · 28,700 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: 15.414 µg/L — LAFAYETTE CITY OF · 28,700 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 13.925 µg/L No EPA limit set Main supplier: BOULDER CITY OF · 166,080 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 0.5896 µg/L No EPA limit set Main supplier: BOULDER CITY OF · 166,080 people · 2019
Highest in the ZIP: 9.08 µg/L — LAFAYETTE CITY OF · 28,700 people · 2019 | 2/2 | 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 |
| Dibromoacetic Acid | 2.87 µg/L No EPA limit set Highest in the ZIP: LAFAYETTE CITY OF · 28,700 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 2.085 µg/L No EPA limit set Highest in the ZIP: LAFAYETTE CITY OF · 28,700 people · 2019 | 1/2 | SYR4 |
| Bromoform | 1.3 µg/L No EPA limit set Highest in the ZIP: LAFAYETTE CITY OF · 28,700 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 1.3 µg/L No EPA limit set Highest in the ZIP: LAFAYETTE CITY OF · 28,700 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 | 2/2 | SYR4 |
| Selenium | 0.9900 µg/L 2% of the EPA limit 50 µg/L Highest in the ZIP: LAFAYETTE CITY OF · 28,700 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 80303
| Supplier | State | Population served |
|---|---|---|
| BOULDER CITY OF | CO | 166,080 |
| LAFAYETTE CITY OF | CO | 28,700 |
Frequently asked questions about ZIP 80303 tap water
Is the tap water in ZIP 80303 safe to drink?
EPA testing detected 19 contaminants across the water suppliers serving ZIP 80303. 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 80303?
2 public water suppliers report EPA drinking-water monitoring for ZIP 80303. Each is listed above with its population served.
What contaminants are in ZIP 80303's water?
EPA monitoring detected Fluoride, Nitrate, TTHM, Nitrate-Nitrite, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.