Public-source edition · measured conditions, mobile trends, and context layers · SIG · August 2026
316areas with measured open data
10areas averaging under 100 Mbps
24registered towers (sample)
25CalSPEED mobile sites
Fixed broadband: Ookla Open Data quarterly tile averages, 2025Q2 to 2026Q1,
(c) Ookla, CC BY-NC-SA 4.0. Mobile: CPUC CalSPEED test sites, nine seasons
2021-2026; click a point for what was measured there. Not every site was revisited every season. Areas with fewer than 30 tests are drawn but not counted as underperforming.
Eligibility and funded areas: CPUC EOY2024. Towers: a sample of FCC-registered
structures; the full inventory with operators, carriers, heights and backhaul is available separately.
Infrastructure: public federal datasets. Toggle layers top right.