California · population 29,403
Lead pipes in San Carlos, CA
10,076 lines still unidentified
Most of San Carlos (population 29,403) gets its water from California Water Service - San Carlos. It reported no confirmed lead service lines, but 10,076 of 10,921 lines are still listed as unknown material, so lead hasn't been ruled out.
0% of California Water Service - San Carlos's service lines are lead or galvanized requiring replacement, lower than the California average (0.1%) and lower than the national average (3.1%).
- Lead 0%
- Galvanized (replace) 0%
- Unknown 92%
- Non-lead 7.7%
Latest lead test for California Water Service - San Carlos (Jan 2022–Dec 2024): 5.8 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 California Water Service - San Carlos.
Water systems serving San Carlos
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| California Water Service - San CarlosMain system | 0 | 0 | 10,076 | 0% |
| Mid-Peninsula Water DistrictServes nearby areas | 0 | 0 | 0 | 0% |
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 San Carlos
The counts above cover the whole water system. To see whether your line is lead, look up your address on California Water Service - San Carlos's official inventory. Utilities had to make these public by October 16, 2024.
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.
Choosing a lead-certified filter · Testing your water · Replacement cost
Nearby cities
- Belmontno lead reported
- Redwoodno lead reported
- Fosterno lead reported
- Athertonno lead reported
- San Mateono lead reported
- Woodsideno lead reported
- Hillsboroughno lead reported
- Menlo Parkno lead reported
Check another water system
Questions
Does San Carlos, CA have lead pipes?
None are confirmed, but California Water Service - San Carlos still lists 10,076 service lines as unknown material.
Who supplies water to San Carlos?
EPA's service area maps place most of San Carlos in California Water Service - San Carlos's service area (PWSID CA4110007). Mid-Peninsula Water District also serves parts of the city or nearby areas.
How do I check whether my San Carlos home has a lead service line?
Search your address on California Water Service - San Carlos'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 San Carlos 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 California Water Service - San Carlos whether your street is scheduled and whether it covers the private side.