What was found in ZIP 80631
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 | 757.5 µg/L 19% of the EPA limit 4000 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/3 | SYR4 |
| Chlorite | 355.5 µg/L 36% of the EPA limit 1000 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019
Highest in the ZIP: 674.95 µg/L — NORTH WELD COUNTY WD · 15,890 people · 2019 | 2/3 | SYR4 |
| Nitrate | 100 µg/L 1% of the EPA limit 10000 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/3 | SYR4 |
| Nitrate-Nitrite | 89.2 µg/L 0.9% of the EPA limit 10000 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/3 | SYR4 |
| Barium | 75 µg/L 3.8% of the EPA limit 2000 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/3 | SYR4 |
| TTHM | 71.05 µg/L 89% of the EPA limit 80 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 3/3 | SYR4 |
| Chloroform | 50.35 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019
Highest in the ZIP: 50.775 µg/L — CENTRAL WELD CNTY WD · 7,662 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 33.45 µg/L 56% of the EPA limit 60 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019
Highest in the ZIP: 48.874 µg/L — CENTRAL WELD CNTY WD · 7,662 people · 2019 | 3/3 | SYR4 |
| Lithium | 25.7 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2024 | 2/3 | UCMR-5 |
| Trichloroacetic Acid | 9.665 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019
Highest in the ZIP: 22.65 µg/L — CENTRAL WELD CNTY WD · 7,662 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 19.21 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 9.565 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 3/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 4.7 µg/L 78% of the EPA limit 6 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/3 | SYR4 |
| Monochloroacetic Acid | 1.975 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019
Highest in the ZIP: 4.11 µg/L — NORTH WELD COUNTY WD · 15,890 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 2.9875 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 2/3 | SYR4 |
| Selenium | 2.825 µg/L 5.7% of the EPA limit 50 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/3 | SYR4 |
| Antimony, Total | 1.4 µg/L 23% of the EPA limit 6 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.4 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 2/3 | SYR4 |
| Bromoform | 0.9700 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/3 | SYR4 |
| 2,4-D | 0.2200 µg/L 0.3% of the EPA limit 70 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/3 | SYR4 |
| Benzo(A)Pyrene | 0.0320 µg/L 16% of the EPA limit 0.2000 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0040 mg/L 27% of the EPA limit 0.0150 mg/L Main supplier: GREELEY CITY OF · 132,310 people · 2025
Highest in the ZIP: 0.0060 mg/L — CENTRAL WELD CNTY WD · 7,662 people · 1999 | 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 80631
| Supplier | State | Population served |
|---|---|---|
| GREELEY CITY OF | CO | 132,310 |
| NORTH WELD COUNTY WD | CO | 15,890 |
| CENTRAL WELD CNTY WD | CO | 7,662 |
Frequently asked questions about ZIP 80631 tap water
Is the tap water in ZIP 80631 safe to drink?
EPA testing detected 22 contaminants across the water suppliers serving ZIP 80631. 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 80631?
3 public water suppliers report EPA drinking-water monitoring for ZIP 80631. Each is listed above with its population served.
What contaminants are in ZIP 80631's water?
EPA monitoring detected Fluoride, Chlorite, Nitrate, Nitrate-Nitrite, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.