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Tap water quality report

Roy, UT

EPA monitoring detected 23 contaminants across the 1 water supplier serving Roy. 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
38,800
people served
23
contaminants found
Utah rankings Lead in Utah PFAS in Utah

What was found in Roy'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
1300 µg/L 13%
of the EPA limit 10000 µg/L
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Copper
424.9 µg/L 33%
of the EPA limit 1300 µg/L
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Barium
280 µg/L 14%
of the EPA limit 2000 µg/L
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Fluoride
200 µg/L 5%
of the EPA limit 4000 µg/L
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
TTHM
38.3 µg/L 48%
of the EPA limit 80 µg/L
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Lithium
31.6 µg/L
No EPA limit set
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2024
1/1 UCMR-5
Lead
29.1 µg/L 194%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Chloroform
25.34 µg/L
No EPA limit set
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
18.045 µg/L 30%
of the EPA limit 60 µg/L
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Bromodichloromethane
10.1 µg/L
No EPA limit set
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Trichloroacetic Acid
10.025 µg/L
No EPA limit set
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Dichloroacetic Acid
9.55 µg/L
No EPA limit set
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Gross Beta Particle Activity
6.175 pCi/L
No EPA limit set
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
5.015 pCi/L 33%
of the EPA limit 15 pCi/L
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Chromium
5 µg/L 5%
of the EPA limit 100 µg/L
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Dibromochloromethane
4.69 µg/L
No EPA limit set
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Arsenic
2.105 µg/L 21%
of the EPA limit 10 µg/L
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Cyanide
2 µg/L 1%
of the EPA limit 200 µg/L
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Bromoform
1.8 µg/L
No EPA limit set
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Dibromoacetic Acid
1.55 µg/L
No EPA limit set
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Selenium
0.9500 µg/L 1.9%
of the EPA limit 50 µg/L
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
0.5600 pCi/L 11%
of the EPA limit 5 pCi/L
Main supplier: ROY CITY WATER SYSTEM · 38,800 people · 2014
1/1 SYR4
Lead
0.0017 mg/L 11%
of the EPA limit 0.0150 mg/L
Main supplier: ROY CITY WATER SYSTEM · 38,800 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 Roy

SupplierPopulation served
ROY CITY WATER SYSTEM 38,800

Frequently asked questions about Roy tap water

Is Roy tap water safe to drink?

EPA testing detected 23 contaminants in the water serving Roy. 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 Roy?

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

What contaminants are in Roy's water?

The contaminants EPA monitoring detected in Roy include Nitrate, Copper, Barium, Fluoride, 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.