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Tap water quality report

Second Mesa, AZ

EPA monitoring detected 9 contaminants across the 1 water supplier serving Second Mesa. 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
255
people served
9
contaminants found
Arizona rankings Lead in Arizona PFAS in Arizona

What was found in Second Mesa'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
1570 µg/L 16%
of the EPA limit 10000 µg/L
Main supplier: Second Mesa Day School - BIA · 255 people · 2019
1/1 SYR4
Fluoride
299 µg/L 7.5%
of the EPA limit 4000 µg/L
Main supplier: Second Mesa Day School - BIA · 255 people · 2018
1/1 SYR4
TTHM
63.4 µg/L 79%
of the EPA limit 80 µg/L
Main supplier: Second Mesa Day School - BIA · 255 people · 2019
1/1 SYR4
Arsenic
26.78 µg/L 268%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
Main supplier: Second Mesa Day School - BIA · 255 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
5.25 µg/L 8.8%
of the EPA limit 60 µg/L
Main supplier: Second Mesa Day School - BIA · 255 people · 2019
1/1 SYR4
Combined Uranium
4.172 µg/L 14%
of the EPA limit 30 µg/L
Main supplier: Second Mesa Day School - BIA · 255 people · 2015
1/1 SYR4
Gross Alpha, Excl. Radon And U
2.8 pCi/L 19%
of the EPA limit 15 pCi/L
Main supplier: Second Mesa Day School - BIA · 255 people · 2015
1/1 SYR4
Selenium
2.8 µg/L 5.6%
of the EPA limit 50 µg/L
Main supplier: Second Mesa Day School - BIA · 255 people · 2018
1/1 SYR4
Lead
0.0050 mg/L 33%
of the EPA limit 0.0150 mg/L
Main supplier: Second Mesa Day School - BIA · 255 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 Second Mesa

SupplierPopulation served
Second Mesa Day School - BIA 255

Frequently asked questions about Second Mesa tap water

Is Second Mesa tap water safe to drink?

EPA testing detected 9 contaminants in the water serving Second Mesa. 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 Second Mesa?

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

What contaminants are in Second Mesa's water?

The contaminants EPA monitoring detected in Second Mesa include Nitrate, Fluoride, TTHM, Arsenic, Total Haloacetic Acids (HAA5). 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.