Water Treatment & Plumbing in Mayer, AZ

What the water is like here

District water and well water need different systems here

The Mayer Domestic Water Improvement District serves roughly 1,400 people from groundwater — 636 connections, fed by eleven wells in the Agua Fria watershed. In utility reporting compiled for 2018–2023, its arsenic averaged about 4.0 ppb, under the EPA’s 10 ppb limit. What shows up more noticeably is disinfection byproducts: total trihalomethanes around 20.6 ppb, well under the 80 ppb federal limit, of which bromoform is the largest component at around 17 ppb. Bromoform is regulated as part of that total rather than on its own. Those compounds are the reason district water here can taste and smell of chlorine, and they are exactly what activated carbon is for.

Read the district’s latest report as well as the average. For 2025 it lists arsenic samples from 2.6 up to 17 ppb and no violation — federal rules judge arsenic on a running annual average at each sampling point, so one high quarter breaks the standard only if it pulls that yearly average over 10 (Mayer DWID, 2025 report). If you want the water you drink held under 10 no matter which quarter it is, that is what an under-sink reverse osmosis system does.

Nitrate averaged around 3.4 ppm over 2018–2023, under the 10 ppm federal limit, but the district’s highest reading was 10 — right at the limit — in 2024 and 7.9 in 2025. The district’s own report advises anyone caring for an infant to ask a health care provider once nitrate is above 5 ppm. Nitrate is also the classic sign of septic or agricultural influence on groundwater, so it is worth watching on a private well nearby.

Homes outside the district are a different problem entirely. Private wells around Mayer, Spring Valley and Cordes Lakes draw from the same fractured, mineral-rich bedrock that gives Yavapai County 43.6% of samples above the EPA arsenic limit in a 33,099-sample statewide analysis — the second-highest rate of any Arizona county. Well water here also runs hard, and iron and sulfur are common.

If you are on district water, a carbon filtration and softening approach usually solves the taste and scale. If you are on a well, start with the $185 Premium Water Test — there is no way to size treatment for a Mayer well without one.

The published numbers for Mayer

Every figure above is reproduced from the linked report. The 2018–2023 averages are EWG’s compilation of what the district reported to the state; the yearly figures are the district’s own annual reports.

What we do in Mayer

Also bookable: reverse osmosis systems — The Kitten at $829, or The Ocelot at $999 — which reduce arsenic, nitrate and the chlorine taste in the water you drink; the $185 Premium Water Test, which you order from SimpleLab and we read with you free; and plumbing & water heaters — tank flush $79, anode rod $245, leaks and fixtures at the flat rates on the pricing page. Drain clearing covers branch drains up to 2-inch and 75 feet; main-line cabling, sewer camera and hydro jetting are not available until new equipment arrives. Every job carries the two-year workmanship warranty plus the manufacturer’s warranty.