Water Around research
Which U.S. water systems have testing records?
How many community water systems have PFAS tests, lead and copper results, and service-area maps?
- Study coverage
- 49,368 active community water systems in the EPA ECHO/SDWIS 2026 Q2 snapshot
- Effective period
- 2026-04-01 to 2026-06-30
- Method
How this was calculated
Each system is counted once for each type of information available. These counts show what we know about the system, not whether its water meets drinking-water standards.
- Sources
- EPA ECHO / SDWIS · EPA UCMR5
Which records are available?
- UCMR59,953 systems
- Lead & copper47,683 systems
- Service area43,123 systems
- All three9,553 systems
- Active community systems
- 49,368
- UCMR5 results
- 9,953
- Lead & copper results
- 47,683
- Published service area
- 43,123
- All three record types
- 9,553
These counts describe whether evidence is present—not whether a system’s water is compliant, safe, or representative of a household faucet.
Limitations
- Having more test records does not mean water quality is better or worse.
- A service-area map does not guarantee that a utility serves a particular address.