What was found in ZIP 80221
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 |
|---|---|---|---|
| Nitrate | 250 µg/L 2.5% of the EPA limit 10000 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 930.5 µg/L — THORNTON CITY OF · 226,465 people · 2019 | 2/2 | SYR4 |
| 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: 902.5 µg/L — THORNTON CITY OF · 226,465 people · 2019 | 2/2 | 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
Highest in the ZIP: 870 µg/L — THORNTON CITY OF · 226,465 people · 2019 | 2/2 | SYR4 |
| Nitrite | 591 µg/L 59% of the EPA limit 1000 µg/L Highest in the ZIP: THORNTON CITY OF · 226,465 people · 2019 | 1/2 | 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: 56.55 µg/L — THORNTON CITY OF · 226,465 people · 2019 | 2/2 | 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: 49.525 µg/L — THORNTON CITY OF · 226,465 people · 2019 | 2/2 | SYR4 |
| Lithium | 10.8 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2025
Highest in the ZIP: 34 µg/L — THORNTON CITY OF · 226,465 people · 2023 | 2/2 | UCMR-5 |
| 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
Highest in the ZIP: 28.97 µg/L — THORNTON CITY OF · 226,465 people · 2019 | 2/2 | SYR4 |
| Chloroform | 20.265 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 25 µg/L — THORNTON CITY OF · 226,465 people · 2019 | 2/2 | SYR4 |
| Cyanide | 24.85 µg/L 12% of the EPA limit 200 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2015 | 1/2 | SYR4 |
| Bromodichloromethane | 8.9 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 20.33 µg/L — THORNTON CITY OF · 226,465 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 3.9 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 15.55 µg/L — THORNTON CITY OF · 226,465 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 12.8 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 6.855 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 8.235 µg/L — THORNTON CITY OF · 226,465 people · 2019 | 2/2 | SYR4 |
| Bromoform | 0.8350 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019
Highest in the ZIP: 7.215 µg/L — THORNTON CITY OF · 226,465 people · 2019 | 2/2 | 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
Highest in the ZIP: 6.047 µg/L — THORNTON CITY OF · 226,465 people · 2018 | 2/2 | 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: 5.856 pCi/L — THORNTON CITY OF · 226,465 people · 2017 | 2/2 | SYR4 |
| Selenium | 5.44 µg/L 11% of the EPA limit 50 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 1/2 | 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: 5.075 µg/L — THORNTON CITY OF · 226,465 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 2.9 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 2.82 µg/L No EPA limit set Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 2/2 | 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: 2.64 pCi/L — THORNTON CITY OF · 226,465 people · 2018 | 2/2 | 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 | 2/2 | 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 | 2/2 | SYR4 |
| Bromate | 1.44 µg/L 14% of the EPA limit 10 µg/L Highest in the ZIP: THORNTON CITY OF · 226,465 people · 2019 | 1/2 | SYR4 |
| Arsenic | 1.14 µg/L 11% of the EPA limit 10 µg/L Main supplier: DENVER WATER BOARD · 1,287,000 people · 2019 | 2/2 | 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 | 1/2 | 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
Highest in the ZIP: 0.2655 µg/L — THORNTON CITY OF · 226,465 people · 2019 | 2/2 | 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 | 1/2 | 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 | 1/2 | 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 | 1/2 | 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 | 1/2 | 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 | 1/2 | SYR4 |
| Pfhxa | 0.0126 µg/L No EPA limit set Highest in the ZIP: THORNTON CITY OF · 226,465 people · 2023 | 1/2 | UCMR-5 |
| Pfpea | 0.0124 µg/L No EPA limit set Highest in the ZIP: THORNTON CITY OF · 226,465 people · 2023 | 1/2 | UCMR-5 |
| Pfba | 0.0104 µg/L No EPA limit set Highest in the ZIP: THORNTON CITY OF · 226,465 people · 2023 | 1/2 | UCMR-5 |
| PFBS | 0.0081 µg/L No EPA limit set Highest in the ZIP: THORNTON CITY OF · 226,465 people · 2023 | 1/2 | UCMR-5 |
| PFOA | 0.0071 µg/L No EPA limit set Highest in the ZIP: THORNTON CITY OF · 226,465 people · 2023 | 1/2 | UCMR-5 |
| PFHXS | 0.0059 µg/L No EPA limit set Highest in the ZIP: THORNTON CITY OF · 226,465 people · 2023 | 1/2 | UCMR-5 |
| PFOS | 0.0050 µg/L No EPA limit set Highest in the ZIP: THORNTON CITY OF · 226,465 people · 2023 | 1/2 | UCMR-5 |
| Pfhpa | 0.0037 µg/L No EPA limit set Highest in the ZIP: THORNTON CITY OF · 226,465 people · 2023 | 1/2 | 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 | 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 80221
| Supplier | State | Population served |
|---|---|---|
| DENVER WATER BOARD | CO | 1,287,000 |
| THORNTON CITY OF | CO | 226,465 |
Frequently asked questions about ZIP 80221 tap water
Is the tap water in ZIP 80221 safe to drink?
EPA testing detected 42 contaminants across the water suppliers serving ZIP 80221. 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 80221?
2 public water suppliers report EPA drinking-water monitoring for ZIP 80221. Each is listed above with its population served.
What contaminants are in ZIP 80221's water?
EPA monitoring detected Nitrate, Fluoride, Nitrate-Nitrite, Nitrite, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.