Plumber in Surprise

Surprise is young. About 168,000 people live in roughly 69,000 homes, the median home was built in 2006, and fewer than 3 percent of homes date from before 1980. The city's own water comes entirely from groundwater, and the city publishes separate hardness numbers for each of its three water systems. HQ Plumbing & Air covers all of Surprise around the clock, with upfront pricing and free estimates.

The City of Surprise's 2025 water quality reports say all of the water the city provides comes from groundwater pumped from the West Salt River Valley Sub-Basin. The city runs 19 wells that feed six water supply facilities. Four of those facilities remove arsenic, and all of them disinfect the water. In 2025 the city pumped about 10,913 acre-feet, roughly 3.6 billion gallons.

The city serves customers through three separate systems and publishes a report for each. The hardness figures below come from the secondary standards table in each 2025 report.

Mountain Vista, which covers neighborhoods between Bell Road and Peoria Avenue such as Marley Park, Royal Ranch and Mountain Vista Ranch, averaged 3.9 grains per gallon, or 67 milligrams per liter, with samples from 46 to 83. Desert Oasis, which includes Asante and Rancho Mercado, averaged 6.2 grains per gallon, or 106 milligrams per liter, with samples from 44 to 190. Surprise Foothills averaged 5.3 grains per gallon, or 91 milligrams per liter, in a narrow range of 87 to 95.

The USGS calls water from 61 to 120 milligrams per liter moderately hard, and above 180 very hard. So the averages in all three systems sit in the moderately hard band, and the highest Desert Oasis sample crossed into very hard. The USGS also says scale can shorten equipment life, raise water heating costs and clog pipes, so even moderately hard water is worth planning for. If you add a softener or reverse osmosis system, the city's report says to follow the manufacturer's maintenance instructions, because skipping maintenance can leave you with poor water quality at home.

Not every Surprise address is on the city system. The city's reports page points residents whose provider isn't listed to the Arizona Corporation Commission's annual reports, which include community water systems that serve some Surprise residents, and the city's My Surprise Address tool lists the water and sewer provider for a property. Check who bills you before you look up your hardness number.

If your property has a backflow preventer, Surprise puts the responsibility on the owner. The city says each device must be tested before it goes into service, after a repair, and at least once a year after that. Only an approved and certified tester can do the test, with a current certified and calibrated gauge, and copies of the report go to the owner, the water provider and the tester. A replaced device needs a new certification, and after the city sets a new meter the device must be tested within 48 hours.

Surprise also delivers recycled water, sometimes called reclaimed or purple pipe water, for irrigation. Using it takes a separate process that involves the city, the Arizona Department of Environmental Quality and Maricopa County, and it includes a cross-connection test coordinated with the city. The reason for all that paperwork is simple: recycled water must never mix with drinking water.