Lead Pipe Map

Washington · population 28,553

Lead pipes in Maple Valley, WA

242 lines still unidentified

Most of Maple Valley (population 28,553) gets its water from Covington Water District. It reported no confirmed lead service lines, but 242 of 18,323 lines are still listed as unknown material, so lead hasn't been ruled out.

0% of Covington Water District's service lines are lead or galvanized requiring replacement, lower than the Washington average (0.3%) and lower than the national average (3.1%).

0Lead
0Galvanized, replace
242Unknown material
18,081Non-lead

Latest lead test for Covington Water District (Jan 2023–Dec 2025): 1.4 ppb 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 Covington Water District.

Water systems serving Maple Valley

Water systemLeadGalv.Unknown% lead
Covington Water DistrictMain system002420%
Cedar River Water & Sewer DistrictServes nearby areas0000%

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 Maple Valley

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

Find the official inventory mapCovington Water District 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 Maple Valley, WA have lead pipes?

None are confirmed, but Covington Water District still lists 242 service lines as unknown material.

Who supplies water to Maple Valley?

EPA's service area maps place most of Maple Valley in Covington Water District's service area (PWSID WA5341650). Cedar River Water & Sewer District also serves parts of the city or nearby areas.

How do I check whether my Maple Valley home has a lead service line?

Search your address on Covington Water District'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 Maple Valley 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 Covington Water District whether your street is scheduled and whether it covers the private side.