Product methodology
Is My Water Safe?
Source contract, normalization path, entity-graph join, refresh posture, and publication limits for this Branmoor product.
Status
Pending. This product is pending. The methodology page is published first so the source contract and join path are visible before Branmoor represents the product as live.
Distribution Scope
Nationwide; TN PWS slice; Davidson County Water Quality Watch
Product Question
ZIP/utility lookup for violations, lead/copper, and drinking-water history.
Primary Sources
- EPA SDWIS — Primary-source input for the pending product methodology
- TDEC water data for TN — Primary-source input for the pending product methodology
- Metro Water where local. — Primary-source input for the pending product methodology
Entity-Graph Join
`pws_id`, service-area polygons, `zip5`, `census_tract_geoid`, utility entity.
Publication Rule
Branmoor does not treat raw public records as the product. A surface is publishable only when the source record is dated, normalized, source-linked, and joined to the relevant Branmoor entity identifiers with enough confidence to state the limits of the result.
Current Methodology Note
Pending methodology. Source contract: EPA SDWIS; TDEC water data for TN; Metro Water where local. Records will be normalized into the Branmoor entity graph. Join path: `pws_id`, service-area polygons, `zip5`, `census_tract_geoid`, utility entity. The public preview will publish only after Branmoor can state source cadence, lineage, and coverage limits.
Limits
Coverage follows the underlying source. Missing state portals, gated APIs, PDF-only filings, suppressed fields, lagged agency refreshes, and entity-name ambiguity can all limit product completeness. Pending products are not marketed as live until those limits are documented on the product surface.