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Tap water quality report

Black Hawk, CO

EPA monitoring detected 21 contaminants across the 1 water supplier serving Black Hawk. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
15,167
people served
21
contaminants found
Colorado rankings Lead in Colorado PFAS in Colorado

What was found in Black Hawk'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.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
456 µg/L 4.6%
of the EPA limit 10000 µg/L
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2019
1/1 SYR4
Chlorite
445 µg/L 45%
of the EPA limit 1000 µg/L
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2019
1/1 SYR4
Fluoride
420 µg/L 11%
of the EPA limit 4000 µg/L
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2012
1/1 SYR4
Nitrate-Nitrite
374 µg/L 3.7%
of the EPA limit 10000 µg/L
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2016
1/1 SYR4
TTHM
82.795 µg/L 103%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
34.75 µg/L 58%
of the EPA limit 60 µg/L
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2019
1/1 SYR4
Lithium
33 µg/L
No EPA limit set
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2024
1/1 UCMR-5
Barium
28.95 µg/L 1.4%
of the EPA limit 2000 µg/L
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2012
1/1 SYR4
Chloroform
25.48 µg/L
No EPA limit set
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2019
1/1 SYR4
Dibromochloromethane
24.155 µg/L
No EPA limit set
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2019
1/1 SYR4
Bromoform
17.3 µg/L
No EPA limit set
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2019
1/1 SYR4
Bromodichloromethane
14.6 µg/L
No EPA limit set
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2019
1/1 SYR4
Dichloroacetic Acid
13.57 µg/L
No EPA limit set
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2019
1/1 SYR4
Dibromoacetic Acid
11.725 µg/L
No EPA limit set
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2019
1/1 SYR4
Trichloroacetic Acid
7.1 µg/L
No EPA limit set
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2019
1/1 SYR4
Xylenes, Total
2.58 µg/L 0%
of the EPA limit 10000 µg/L
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2019
1/1 SYR4
Monobromoacetic Acid
2.5 µg/L
No EPA limit set
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2019
1/1 SYR4
Antimony, Total
2 µg/L 33%
of the EPA limit 6 µg/L
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2012
1/1 SYR4
Combined Uranium
1.2 µg/L 4%
of the EPA limit 30 µg/L
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2017
1/1 SYR4
Monochloroacetic Acid
1.19 µg/L
No EPA limit set
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2019
1/1 SYR4
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
Main supplier: BLACK HAWK CITY OF · 15,167 people · 2025
1/1 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 Black Hawk

SupplierPopulation served
BLACK HAWK CITY OF 15,167

Frequently asked questions about Black Hawk tap water

Is Black Hawk tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Black Hawk. 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 Black Hawk?

1 public water supplier report drinking-water monitoring for Black Hawk, Colorado to the EPA. Each is listed above with its population served.

What contaminants are in Black Hawk's water?

The contaminants EPA monitoring detected in Black Hawk include Nitrate, Chlorite, Fluoride, Nitrate-Nitrite, TTHM. 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.