Lead Pipe Map

Arizona · population 4,589

Lead pipes in Dewey-Humboldt, AZ

422 lines still unidentified

Most of Dewey-Humboldt (population 4,589) gets its water from Humboldt Water System. It reported no confirmed lead service lines, but 422 of 422 lines are still listed as unknown material, so lead hasn't been ruled out.

0% of Humboldt Water System's service lines are lead or galvanized requiring replacement, lower than the Arizona average (0.1%) and lower than the national average (3.1%).

0Lead
0Galvanized, replace
422Unknown material
0Non-lead

Latest lead test for Humboldt Water System (Jan 2024–Dec 2026): not detected at the 90th percentile, against a 15 ppb federal action level. Full test history.

Compliance record: EPA lists no Lead and Copper Rule violations since 2015 for Humboldt Water System.

Water systems serving Dewey-Humboldt

Water systemLeadGalv.Unknown% lead
Humboldt Water SystemMain system004220%

Matched from EPA water system service area boundaries and the cities each system reports serving. Edges of the city may be served by a neighboring system; your water bill names your utility.

Check your address in Dewey-Humboldt

The counts above cover the whole water system. To see whether your line is lead, look up your address on Humboldt Water System's official inventory. Utilities had to make these public by October 16, 2024.

Find the official inventory mapHumboldt Water System details

No map yet? Do the 2-minute scratch and magnet test.

Protect your drinking water

If your line is lead, galvanized or unknown, use a filter certified to NSF/ANSI 53 for lead for drinking, cooking and baby formula, and use only cold water.

Pitcher filtersCheapest start. Pick one certified to NSF/ANSI 53 for lead, such as Brita Elite, PUR Plus or ZeroWater.See pitchers Faucet-mount filtersFilters straight from the tap. Look for NSF/ANSI 53 lead reduction on the box.See faucet filters Under-sink systemsBest for families. Carbon block (NSF 53) or reverse osmosis (NSF 58) units rated for lead.See under-sink

Choosing a lead-certified filter · Testing your water · Replacement cost

Nearby cities

Check another water system

Questions

Does Dewey-Humboldt, AZ have lead pipes?

None are confirmed, but Humboldt Water System still lists 422 service lines as unknown material.

Who supplies water to Dewey-Humboldt?

EPA's service area maps place most of Dewey-Humboldt in Humboldt Water System's service area (PWSID AZ0413052).

How do I check whether my Dewey-Humboldt home has a lead service line?

Search your address on Humboldt Water System's service line inventory map. You can also scratch the pipe where water enters your home: lead is soft, dull gray, scratches to shiny silver and doesn't attract a magnet.

When will lead pipes in Dewey-Humboldt be replaced?

EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask Humboldt Water System whether your street is scheduled and whether it covers the private side.