Water treatment & plumbing in Congress & Yarnell, AZ

What the water is like here

Two elevations, two water problems, no municipal system

Yarnell sits at about 4,780 feet in the Weaver Mountains; Congress sits near 3,000 feet in the high desert below Yarnell Hill — close to 1,800 feet apart, and Highway 89 climbs roughly 1,000 of them in a little under four miles of the hill, by ADOT’s account. Most of each town is on a regulated community water system: the Yarnell Water Improvement Association (two groundwater wells, both in Peeples Valley, and about 520 connections) and the Congress Domestic Water Improvement District. Those are tested and reported like any public supply. What they don’t address is hardness — it is not a regulated contaminant — which is why softeners are the common ask on system water here. If the system water is chlorinated, the supplier says to protect softener resin from chlorine: a Tiger puts carbon in the same tank, or the Lynx goes ahead of the Bobcat.

One number on the Congress system is worth knowing: across 2018–2023 its nitrate averaged about 8.25 ppm, under the 10 ppm limit but close enough to matter in a house with a baby under six months old. The CDC says reverse osmosis at the kitchen tap can reduce nitrate; a test of the RO water shows your result.

Outlying properties — up the Weavers, out toward Peeples Valley, and on the parcels between the two towns — are on private wells, and those nobody regulates, tests or monitors. That is where the county’s arsenic problem lands. A peer-reviewed analysis of 33,099 Arizona water samples found 43.6% of Yavapai County samples above the EPA’s 10 ppb arsenic limit — the second-highest rate of any Arizona county. Arsenic here is mostly geological, not industrial: it leaches out of the granitic and volcanic bedrock the Weavers are made of. There is no upstream fix and no remediation; treatment happens at the house.

Hardness is the other constant. Groundwater moving slowly through mineral-rich rock in an arid climate comes out hard to very hard, and in our own field testing wells in this corner of the county commonly run 22–32+ grains per gallon. That is the scale on your fixtures, and scale costs a gas water heater efficiency (in the tests Pacific Northwest National Laboratory reviewed, the effect on electric tank heaters was negligible). Iron staining and sulfur smell are common on top of it and vary property to property on the same road.

The 2013 Yarnell Hill Fire changed a lot of infrastructure in this area, and rebuilt homes often have newer plumbing on older wells. Whatever the combination, the $185 Premium Water Test comes first — 53 parameters including arsenic, and we read the results with you free.

The published numbers for Congress & Yarnell

Every figure above is reproduced from the linked source. Hardness is not a regulated contaminant, so the number for your house has to be measured at your tap.

What we do in Congress & Yarnell

Also bookable now:

• Reverse osmosis systems: under the sink, the Kitten, $829, or the Ocelot, $999. It can reduce arsenic V and nitrate in the water you drink (not certified; a test of the RO water shows your result). On a well, the water must be inside its limits (iron up to 0.3 ppm, manganese up to 0.1 ppm, arsenic V up to 300 ppb), and the job must need no permit. If a granite, quartz or stainless counter needs a new faucet hole, the Ocelot goes over $1,000 and waits for the licenses.
• The $185 Premium Water Test, which you order from SimpleLab and we read with you free.
• 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 offered yet.

Every job carries the two-year workmanship warranty plus the maker’s or the supplier’s warranty on the parts.