Working with JSA
Lead in drinking water testing
AB 2370 testing support for covered child care centers, plus lead-in-water sampling and reporting for homes, workplaces, and other facilities.
Start with your questions.
Lead in drinking water usually comes from plumbing materials rather than the water source itself. Lead cannot be seen, tasted, or smelled, so properly planned sampling is the only way to determine whether it is present at a specific tap.
New to this topic? Read our AB 2370 guide →
Your agreed ScopeThe work included in the assignment: areas, materials, methods, reporting, and any exclusions. will describe the areas we assess, the work included, and any limits on access or testing.
Understand the context
What this service looks at
The amount of lead released can vary by fixture, plumbing material, water chemistry, and how long water has remained in the pipes. A useful sampling plan identifies the fixture and follows the correct collection sequence so the results can support a real decision.
EPA: Lead in drinking water ↗Common materials, locations, or project types
- Older service lines and interior plumbing
- Brass or chrome-plated brass faucets and fittings
- Lead solder and other legacy plumbing components
- Individual fixtures that are seldom used or where water remains stagnant
- Child care centers, housing, workplaces, and commercial properties
When an assessment can help
- When an owner wants to understand lead levels at drinking or cooking fixtures
- After plumbing changes, fixture replacement, or nearby work that may disturb service lines
- For AB 2370 initial or recurring five-year testing at covered California child care centers
- For other housing, facility, or grant-program sampling requirements
- When prior results require confirmation, follow-up, or corrective-action retesting
What you may receive
- Outlet inventories, sample identification, and fixture-specific results
- Chain-of-custody and accredited laboratory documentation
- Plain-language review of findings and affected fixtures
- Organized report packages and corrective-action retesting when requested
What the work involves
- Confirm the sampling purpose, building use, fixtures, and required protocol
- Coordinate access and create a clear fixture inventory with photographs
- Collect first-draw, flush, or follow-up samples as required
- Maintain chain-of-custody records that track sample handling and coordinate analysis with a California ELAP-accredited laboratory
Prepare for a useful conversation
Before your visit
Share the property address, how the building is used, the work being planned, and the areas of concern. Include previous reports, photographs, drawings, access restrictions, and deadlines when available.
Agree on the scope
Confirm which areas and materials are included, whether sampling or follow-up visits are planned, and who needs the report. A limited assessment describes the areas evaluated; it does not automatically cover every part of a property.
Use the complete report
Read conclusions alongside the scope, laboratory or instrument results, photographs, and limitations. If the planned work changes or additional materials are discovered, ask whether further assessment is needed.
Prepare your project details →Your questions are welcome
Let’s talk about your property.
You don’t have to choose a test on your own. Tell us what you’ve noticed or what work you’re planning, and we’ll help you understand the next step.