← Thornton, CO

Tap water quality report

ZIP 80260 — Thornton, CO

EPA monitoring across the 3 water suppliers serving ZIP 80260 in Thornton, CO detected 40 contaminants. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier below, with the EPA limit for each.

3
water suppliers
287,070
people served
40
contaminants found

What was found in ZIP 80260

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.

ContaminantLevel vs EPA limitSuppliersSource
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: 1100 µg/L — FEDERAL HEIGHTS CITY OF · 11,678 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
2/3 SYR4
Nitrate-Nitrite
870 µg/L 8.7%
of the EPA limit 10000 µg/L
Main supplier: THORNTON CITY OF · 226,465 people · 2019
1/3 SYR4
Nitrite
591 µg/L 59%
of the EPA limit 1000 µg/L
Main supplier: THORNTON CITY OF · 226,465 people · 2019
1/3 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: 53.66 µg/L — NORTHGLENN CITY OF · 48,927 people · 2019
3/3 SYR4
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
Highest in the ZIP: 39.195 µg/L — NORTHGLENN CITY OF · 48,927 people · 2019
3/3 SYR4
Lithium
34 µg/L
No EPA limit set
Main supplier: THORNTON CITY OF · 226,465 people · 2023
Highest in the ZIP: 34.2 µg/L — FEDERAL HEIGHTS CITY OF · 11,678 people · 2024
3/3 UCMR-5
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
3/3 SYR4
Trichloroacetic Acid
8.235 µg/L
No EPA limit set
Main supplier: THORNTON CITY OF · 226,465 people · 2019
Highest in the ZIP: 9.195 µg/L — NORTHGLENN CITY OF · 48,927 people · 2019
3/3 SYR4
Bromoform
7.215 µg/L
No EPA limit set
Main supplier: THORNTON CITY OF · 226,465 people · 2019
3/3 SYR4
Combined Uranium
6.047 µg/L 20%
of the EPA limit 30 µg/L
Main supplier: THORNTON CITY OF · 226,465 people · 2018
3/3 SYR4
Gross Beta Particle Activity
5.856 pCi/L
No EPA limit set
Main supplier: THORNTON CITY OF · 226,465 people · 2017
2/3 SYR4
Monochloroacetic Acid
5.765 µg/L
No EPA limit set
Highest in the ZIP: FEDERAL HEIGHTS CITY OF · 11,678 people · 2019
2/3 SYR4
Dibromoacetic Acid
5.075 µg/L
No EPA limit set
Main supplier: THORNTON CITY OF · 226,465 people · 2019
3/3 SYR4
Monobromoacetic Acid
1.0975 µg/L
No EPA limit set
Main supplier: THORNTON CITY OF · 226,465 people · 2019
Highest in the ZIP: 4.5525 µg/L — NORTHGLENN CITY OF · 48,927 people · 2019
3/3 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
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
Highest in the ZIP: 2.5 pCi/L — FEDERAL HEIGHTS CITY OF · 11,678 people · 2019
3/3 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
Arsenic
0.8990 µg/L 9%
of the EPA limit 10 µg/L
Main supplier: THORNTON CITY OF · 226,465 people · 2019
2/3 SYR4
Styrene
0.6590 µg/L 0.7%
of the EPA limit 100 µg/L
Highest in the ZIP: NORTHGLENN CITY OF · 48,927 people · 2019
1/3 SYR4
1,1,1-Trichloroethane
0.5630 µg/L 0.3%
of the EPA limit 200 µg/L
Highest in the ZIP: NORTHGLENN CITY OF · 48,927 people · 2019
1/3 SYR4
Carbon Tetrachloride
0.5330 µg/L 11%
of the EPA limit 5 µg/L
Highest in the ZIP: NORTHGLENN CITY OF · 48,927 people · 2019
1/3 SYR4
Selenium
0.5000 µg/L 1%
of the EPA limit 50 µg/L
Highest in the ZIP: NORTHGLENN CITY OF · 48,927 people · 2019
2/3 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
2/3 SYR4
Bhc-Gamma
0.0760 µg/L 38%
of the EPA limit 0.2000 µg/L
Highest in the ZIP: FEDERAL HEIGHTS CITY OF · 11,678 people · 2019
1/3 SYR4
Thallium, Total
0.0400 µg/L 2%
of the EPA limit 2 µg/L
Highest in the ZIP: NORTHGLENN CITY OF · 48,927 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
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 80260

SupplierStatePopulation served
THORNTON CITY OF CO 226,465
NORTHGLENN CITY OF CO 48,927
FEDERAL HEIGHTS CITY OF CO 11,678

Frequently asked questions about ZIP 80260 tap water

Is the tap water in ZIP 80260 safe to drink?

EPA testing detected 40 contaminants across the water suppliers serving ZIP 80260. 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 80260?

3 public water suppliers report EPA drinking-water monitoring for ZIP 80260. Each is listed above with its population served.

What contaminants are in ZIP 80260'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.