What was found in ZIP 80023
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 | 902.5 µg/L 23% of the EPA limit 4000 µg/L Main supplier: THORNTON CITY OF · 226,465 people · 2019
Highest in the ZIP: 935 µg/L — BROOMFIELD CITY AND COUNTY OF · 106,153 people · 2019 | 3/3 | SYR4 |
| Nitrate | 930.5 µg/L 9.3% of the EPA limit 10000 µg/L Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 870 µg/L 8.7% of the EPA limit 10000 µg/L Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 3/3 | SYR4 |
| Nitrite | 591 µg/L 59% of the EPA limit 1000 µg/L Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 2/3 | SYR4 |
| TTHM | 56.55 µg/L 71% of the EPA limit 80 µg/L Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 3/3 | SYR4 |
| Barium | 49.525 µg/L 2.5% of the EPA limit 2000 µg/L Main supplier: THORNTON CITY OF · 226,465 people · 2019
Highest in the ZIP: 55.5 µg/L — WESTMINSTER CITY OF · 202,078 people · 2019 | 3/3 | SYR4 |
| Lithium | 34 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2023 | 2/3 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 28.97 µg/L 48% of the EPA limit 60 µg/L Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 3/3 | SYR4 |
| Chloroform | 25 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 20.33 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 15.55 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 12 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2019
Highest in the ZIP: 12.9875 µg/L — BROOMFIELD CITY AND COUNTY OF · 106,153 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 8.235 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 3/3 | SYR4 |
| Bromoform | 7.215 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 2/3 | SYR4 |
| Combined Uranium | 6.047 µg/L 20% of the EPA limit 30 µg/L Main supplier: THORNTON CITY OF · 226,465 people · 2018 | 2/3 | SYR4 |
| Gross Beta Particle Activity | 5.856 pCi/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2017 | 1/3 | SYR4 |
| Dibromoacetic Acid | 5.075 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 2/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2.64 pCi/L 18% of the EPA limit 15 pCi/L Main supplier: THORNTON CITY OF · 226,465 people · 2018 | 2/3 | SYR4 |
| Chromium | 1.66 µg/L 1.7% of the EPA limit 100 µg/L Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 2/3 | SYR4 |
| Bromate | 1.44 µg/L 14% of the EPA limit 10 µg/L Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 1/3 | SYR4 |
| Monochloroacetic Acid | 1.241 µg/L No EPA limit set Highest in the ZIP: BROOMFIELD CITY AND COUNTY OF · 106,153 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.0975 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 1/3 | SYR4 |
| Arsenic | 0.8990 µg/L 9% of the EPA limit 10 µg/L Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 0.8105 pCi/L 16% of the EPA limit 5 pCi/L Main supplier: THORNTON CITY OF · 226,465 people · 2018 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.7000 µg/L 12% of the EPA limit 6 µg/L Highest in the ZIP: WESTMINSTER CITY OF · 202,078 people · 2017 | 1/3 | SYR4 |
| Xylenes, Total | 0.6765 µg/L 0% of the EPA limit 10000 µg/L Highest in the ZIP: WESTMINSTER CITY OF · 202,078 people · 2019 | 1/3 | SYR4 |
| Antimony, Total | 0.2655 µg/L 4.4% of the EPA limit 6 µg/L Main supplier: THORNTON CITY OF · 226,465 people · 2019 | 1/3 | SYR4 |
| Selenium | 0.2500 µg/L 0.5% of the EPA limit 50 µg/L Highest in the ZIP: BROOMFIELD CITY AND COUNTY OF · 106,153 people · 2019 | 1/3 | SYR4 |
| Pfhxa | 0.0126 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2023 | 1/3 | UCMR-5 |
| Pfpea | 0.0124 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2023 | 1/3 | UCMR-5 |
| Pfba | 0.0104 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2023 | 1/3 | UCMR-5 |
| PFBS | 0.0081 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2023 | 1/3 | UCMR-5 |
| PFOA | 0.0071 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2023 | 1/3 | UCMR-5 |
| PFHXS | 0.0059 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2023 | 1/3 | UCMR-5 |
| PFOS | 0.0050 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2023 | 1/3 | UCMR-5 |
| Pfhpa | 0.0037 µg/L No EPA limit set Main supplier: THORNTON CITY OF · 226,465 people · 2023 | 1/3 | UCMR-5 |
| Lead | 0.0023 mg/L 15% of the EPA limit 0.0150 mg/L Main supplier: THORNTON CITY OF · 226,465 people · 2025
Highest in the ZIP: 0.0025 mg/L — BROOMFIELD CITY AND COUNTY OF · 106,153 people · 2024 | 3/3 | 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 80023
| Supplier | State | Population served |
|---|---|---|
| THORNTON CITY OF | CO | 226,465 |
| WESTMINSTER CITY OF | CO | 202,078 |
| BROOMFIELD CITY AND COUNTY OF | CO | 106,153 |
Frequently asked questions about ZIP 80023 tap water
Is the tap water in ZIP 80023 safe to drink?
EPA testing detected 37 contaminants across the water suppliers serving ZIP 80023. 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 80023?
3 public water suppliers report EPA drinking-water monitoring for ZIP 80023. Each is listed above with its population served.
What contaminants are in ZIP 80023's water?
EPA monitoring detected Fluoride, Nitrate, Nitrate-Nitrite, Nitrite, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.