Is Mayer, AZ Tap Water Safe? Quality & Contaminants

What was found in Mayer'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.

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate	8535 µg/L 85% of the EPA limit 10000 µg/L Main supplier: MAYER DWID · 1,400 people · 2019 Highest in the city: 9195 µg/L — CHIMNEY ESTATES · 90 people · 2019	4/4	SYR4
Nitrate-Nitrite	7065 µg/L 71% of the EPA limit 10000 µg/L Main supplier: MAYER DWID · 1,400 people · 2019 Highest in the city: 8517 µg/L — CHIMNEY ESTATES · 90 people · 2019	3/4	SYR4
Copper	428 µg/L 33% of the EPA limit 1300 µg/L Main supplier: MAYER DWID · 1,400 people · 2018 Highest in the city: 432 µg/L — ARCOSANTI CAMP · 115 people · 2019	4/4	SYR4
Fluoride	341 µg/L 8.5% of the EPA limit 4000 µg/L Main supplier: MAYER DWID · 1,400 people · 2019	4/4	SYR4
TTHM	87.28 µg/L 109% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: MAYER DWID · 1,400 people · 2019	3/4	SYR4
Barium	87 µg/L 4.4% of the EPA limit 2000 µg/L Main supplier: MAYER DWID · 1,400 people · 2019	4/4	SYR4
Bromoform	52.04 µg/L No EPA limit set Main supplier: MAYER DWID · 1,400 people · 2019	2/4	SYR4
Lead	21.025 µg/L 140% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: MAYER DWID · 1,400 people · 2018	4/4	SYR4
Dibromochloromethane	19.055 µg/L No EPA limit set Main supplier: MAYER DWID · 1,400 people · 2019	2/4	SYR4
Selenium	6.74 µg/L 13% of the EPA limit 50 µg/L Main supplier: MAYER DWID · 1,400 people · 2019 Highest in the city: 11.95 µg/L — CHIMNEY ESTATES · 90 people · 2019	2/4	SYR4
Total Haloacetic Acids (HAA5)	7.76 µg/L 13% of the EPA limit 60 µg/L Main supplier: MAYER DWID · 1,400 people · 2019 Highest in the city: 8.45 µg/L — CHIMNEY ESTATES · 90 people · 2019	3/4	SYR4
Dibromoacetic Acid	8.105 µg/L No EPA limit set Main supplier: MAYER DWID · 1,400 people · 2019	2/4	SYR4
Arsenic	7.72 µg/L 77% of the EPA limit 10 µg/L Main supplier: MAYER DWID · 1,400 people · 2019	4/4	SYR4
Bromodichloromethane	5.84 µg/L No EPA limit set Main supplier: MAYER DWID · 1,400 people · 2019	2/4	SYR4
Chromium	1.495 µg/L 1.5% of the EPA limit 100 µg/L Main supplier: MAYER DWID · 1,400 people · 2019 Highest in the city: 1.5 µg/L — KEMPNER INSTITUTE FOR SUSTAINABLE LIVING · 210 people · 2013	2/4	SYR4
Chloroform	1.4 µg/L No EPA limit set Main supplier: MAYER DWID · 1,400 people · 2019	1/4	SYR4
Monobromoacetic Acid	1.1 µg/L No EPA limit set Highest in the city: CHIMNEY ESTATES · 90 people · 2019	1/4	SYR4
Lead	0.0035 mg/L 23% of the EPA limit 0.0150 mg/L Main supplier: MAYER DWID · 1,400 people · 2024 Highest in the city: 0.0090 mg/L — KEMPNER INSTITUTE FOR SUSTAINABLE LIVING · 210 people · 2019	4/4	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 Mayer

Supplier	Population served
MAYER DWID	1,400
KEMPNER INSTITUTE FOR SUSTAINABLE LIVING	210
ARCOSANTI CAMP	115
CHIMNEY ESTATES	90

Frequently asked questions about Mayer tap water

Is Mayer tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Mayer. 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 Mayer?

4 public water suppliers report drinking-water monitoring for Mayer, Arizona to the EPA. Each is listed above with its population served.

What contaminants are in Mayer's water?

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