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Tap water quality report

Dayton, NV

EPA monitoring detected 21 contaminants across the 1 water supplier serving Dayton. 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
16,000
people served
21
contaminants found
Nevada rankings Lead in Nevada PFAS in Nevada

What was found in Dayton'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
4015 µg/L 40%
of the EPA limit 10000 µg/L
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Nitrate-Nitrite
2525 µg/L 25%
of the EPA limit 10000 µg/L
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Fluoride
664.5 µg/L 17%
of the EPA limit 4000 µg/L
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Copper
185 µg/L 14%
of the EPA limit 1300 µg/L
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Barium
74.6 µg/L 3.7%
of the EPA limit 2000 µg/L
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Lithium
64.1 µg/L
No EPA limit set
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2024
1/1 UCMR-5
TTHM
24.825 µg/L 31%
of the EPA limit 80 µg/L
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Lead
22.42 µg/L 149%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Chloroform
19.58 µg/L
No EPA limit set
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Gross Beta Particle Activity
13 pCi/L
No EPA limit set
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Arsenic
8.3 µg/L 83%
of the EPA limit 10 µg/L
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Combined Uranium
7.10535 µg/L 24%
of the EPA limit 30 µg/L
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Bromoform
6.87 µg/L
No EPA limit set
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Dibromochloromethane
6.39 µg/L
No EPA limit set
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Bromodichloromethane
4.33 µg/L
No EPA limit set
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Dibromoacetic Acid
3.1 µg/L
No EPA limit set
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
3.1 µg/L 5.2%
of the EPA limit 60 µg/L
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
2.66 pCi/L 18%
of the EPA limit 15 pCi/L
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2018
1/1 SYR4
Dichloroacetic Acid
1 µg/L
No EPA limit set
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
0.4000 pCi/L 8%
of the EPA limit 5 pCi/L
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2019
1/1 SYR4
Lead
0.00080 mg/L 5.3%
of the EPA limit 0.0150 mg/L
Main supplier: DAYTON VALLEY WATER SYSTEM · 16,000 people · 2023
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 Dayton

SupplierPopulation served
DAYTON VALLEY WATER SYSTEM 16,000

Frequently asked questions about Dayton tap water

Is Dayton tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Dayton. 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 Dayton?

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

What contaminants are in Dayton's water?

The contaminants EPA monitoring detected in Dayton include Nitrate, Nitrate-Nitrite, Fluoride, Copper, 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.