And even after being targeted in the investigation, a handful of Upper East Side buildings remain noncompliant with the new testing law, city health officials said. As of July 24, that figure had increased to 92%, the health department said. The new law, which took effect May 8, requires the operators of building water cooling towers to test them for Legionella and submit the test results to a city database every 31 days. Fowler said the health department is still figuring out how to increase compliance with the latest Legionella testing requirements. Meanwhile, the city health department is still addressing a staffing shortage that has hampered the pace of cooling tower inspections in recent years.