What was found in Greeley's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every 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 | 1/6 | SYR4 |
| Chlorite | 355.5 µg/L 36% of the EPA limit 1000 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/6 | SYR4 |
| Nitrate | 100 µg/L 1% of the EPA limit 10000 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/6 | 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 | 1/6 | SYR4 |
| Barium | 75 µg/L 3.8% of the EPA limit 2000 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/6 | SYR4 |
| TTHM | 71.05 µg/L 89% of the EPA limit 80 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 2/6 | SYR4 |
| Chloroform | 50.35 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019
Highest in the city: 50.775 µg/L — CENTRAL WELD CNTY WD · 7,662 people · 2019 | 2/6 | 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 city: 48.874 µg/L — CENTRAL WELD CNTY WD · 7,662 people · 2019 | 2/6 | SYR4 |
| Lithium | 25.7 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2024 | 1/6 | UCMR-5 |
| Trichloroacetic Acid | 9.665 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019
Highest in the city: 22.65 µg/L — CENTRAL WELD CNTY WD · 7,662 people · 2019 | 2/6 | SYR4 |
| Dichloroacetic Acid | 19.21 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 2/6 | SYR4 |
| Bromodichloromethane | 9.565 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 2/6 | 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 | 1/6 | SYR4 |
| Dibromochloromethane | 2.9875 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/6 | SYR4 |
| Selenium | 2.825 µg/L 5.7% of the EPA limit 50 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/6 | SYR4 |
| Monochloroacetic Acid | 1.975 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019
Highest in the city: 2.65 µg/L — CENTRAL WELD CNTY WD · 7,662 people · 2019 | 2/6 | SYR4 |
| Antimony, Total | 1.4 µg/L 23% of the EPA limit 6 µg/L Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/6 | SYR4 |
| Monobromoacetic Acid | 1.4 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/6 | SYR4 |
| Bromoform | 0.9700 µg/L No EPA limit set Main supplier: GREELEY CITY OF · 132,310 people · 2019 | 1/6 | 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 | 1/6 | 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 | 1/6 | 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 city: 0.0060 mg/L — CENTRAL WELD CNTY WD · 7,662 people · 1999 | 6/6 | 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.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Greeley
| Supplier | Population served |
|---|---|
| GREELEY CITY OF | 132,310 |
| CENTRAL WELD CNTY WD | 7,662 |
| WOODLANDS EAST | 350 |
| GREELEY MOBILE MANOR | 180 |
| GREEN ACRES MOBILE HOME PARK | 180 |
| PARADISE VILLAGE COOP MOBILE HOME PARK | 140 |
Frequently asked questions about Greeley tap water
Is Greeley tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Greeley. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Greeley?
6 public water suppliers report drinking-water monitoring for Greeley, Colorado to the EPA. Each is listed above with its population served.
What contaminants are in Greeley's water?
The contaminants EPA monitoring detected in Greeley include Fluoride, Chlorite, Nitrate, Nitrate-Nitrite, Barium. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.