Lead Pipe Map

California · population 19,712

Lead pipes in Oroville, CA

3,879 lines still unidentified

Most of Oroville (population 19,712) gets its water from Cal-Water Service Co.-Oroville. It reported no confirmed lead service lines, but 3,879 of 4,108 lines are still listed as unknown material, so lead hasn't been ruled out.

0% of Cal-Water Service Co.-Oroville's service lines are lead or galvanized requiring replacement, lower than the California average (0.1%) and lower than the national average (3.1%).

0Lead
0Galvanized, replace
3,879Unknown material
229Non-lead

Latest lead test for Cal-Water Service Co.-Oroville (Jan 2023–Dec 2025): 0.9 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 Cal-Water Service Co.-Oroville.

Water systems serving Oroville

Water systemLeadGalv.Unknown% lead
Cal-Water Service Co.-OrovilleMain system003,8790%
South Feather W&P - Miners RanchServes 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 Oroville

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

Find the official inventory mapCal-Water Service Co.-Oroville 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 Oroville, CA have lead pipes?

None are confirmed, but Cal-Water Service Co.-Oroville still lists 3,879 service lines as unknown material.

Who supplies water to Oroville?

EPA's service area maps place most of Oroville in Cal-Water Service Co.-Oroville's service area (PWSID CA0410005). South Feather W&P - Miners Ranch also serves parts of the city or nearby areas.

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

Search your address on Cal-Water Service Co.-Oroville'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 Oroville 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 Cal-Water Service Co.-Oroville whether your street is scheduled and whether it covers the private side.