Short answer: it varies by jurisdiction, but 30 to 90 days is common, and some agencies keep plate data longer. Retention is a local policy choice, not a fixed feature of the cameras.
What the system records
Flock cameras photograph a plate and record the timestamp and location, plus vehicle descriptors like make, model and color. They do not measure speed (full answer). Whether the agency keeps that record for 30 days, 90 days or longer is set by local policy and law.
Retention is a policy choice
Some states restrict how long plate data can be stored; others have no limit at all. That's why the state legality board exists — it tracks what's reported in each state, including retention rules.
How to find your local policy
- Ask your police department what its retention window is.
- File a public records request for the data-retention policy.
- Check council minutes — retention is often decided when a contract is approved.
To see what's documented in your state, run the check-your-area tool. For the wider privacy picture, read why Flock cameras are controversial and the stalking risk.
Frequently asked questions
Can my plate data be shared out of state?
There are reported examples of out-of-state access to plate readers — see California and who can access Flock data.
Can I find out if my plate has been scanned?
Tools like Have I Been Flocked exist for this. How much is disclosed depends on the agency.