Swimmable Cities Need a Public Interface

People want to know whether nearby water is safe, accessible, legal, and pleasant to enter. The answer may be scattered across laboratory reports, city dashboards, weather services, news stories, community groups, and temporary warnings.

A public interface could bring those layers together without pretending that one score captures the full situation. It should communicate measurement time, source, confidence, hazards, accessibility, and local rules in language ordinary swimmers can act on.

A swimmable river or harbor connects water treatment, biodiversity, public space, transport, health, and climate adaptation. It gives residents a direct relationship with systems that otherwise remain abstract infrastructure.

The product opportunity is broader than a map of attractive locations. It is a shared evidence layer where cities can publish data, communities can report conditions, researchers can compare progress, and campaigns can make improvement visible.

HAAM's initial lab page maps the information architecture: location records, current-status language, data provenance, public access, community reporting, and responsible warnings. It deliberately avoids presenting itself as live safety guidance before verified feeds and local partners exist.

The next step would be a pilot with one city or watershed, using official measurements and a clearly governed correction process. Trust must be designed before scale.