What’s changed
What’s changed. Dated, in order.
A record of what has changed in our database: new product listings, certifications added or lapsed, recalls, discontinuations, re-checks, and each new version of the national water-system records.
October 2026
- Water-system records
Water-system records updated
A new version of the water-system records in our database: 1 of 8 sources changed. A new version means newer source data in our records, not a change in your water.
- Another public source2026 Q3Changed
- California State Water BoardFrom Jan 2026Unchanged
- Census ZIP areas2020Unchanged
- Census ZIP-to-county links2020Unchanged
- EPA SDWIS/ECHO2026 Q3Unchanged
- EPA service-area boundaries2026Unchanged
- EPA UCMR 5Jan 2023 to Dec 2025Unchanged
- Regional hardness (WQX)Jan 2010 to Aug 2026Unchanged
- Water-system records
Water-system records first published
The first version of the national water-system records in our database. Each source is shown with the period its data covers.
- California State Water BoardFrom Jan 2026Added
- Census ZIP areas2020Added
- Census ZIP-to-county links2020Added
- EPA SDWIS/ECHO2026 Q3Added
- EPA service-area boundaries2026Added
- EPA UCMR 5Jan 2023 to Dec 2025Added
- Regional hardness (WQX)Jan 2010 to Aug 2026Added