Claim: Tap water can return a positive lateral flow test result for Covid-19.
Fact-check: Tap water can't test positive for Covid-19 - Full Fact
Verdict: putting tap water on a lateral flow test will break it. claims that water has tested positive have no basis in fact, because the test is used incorrectly.
Organisation: Full Fact
Author: Sarah Turnnidge
Date published: 2022-01-04T00:00:00