Seattle Public Schools has results from its water-quality tests online.

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The state Board of Health’s requirements that schools test their drinking water for lead won’t go into effect until 2017 because of budget shortfalls. Still, many school districts already conduct some form of water-quality testing.

After high levels of lead were found in water at six Tacoma elementary schools, the school district planned an audit of all past water-quality tests. While the high levels were discovered in May, the district announced the results only this week.

In Seattle, school leaders started water-quality testing in 2004, looking for contaminants including lead, cadmium and copper, according to the district. At the time, districtwide testing showed that at least 3.8 percent of schools’ drinking fountains had sustained lead levels considered dangerous by the federal government.

Each Seattle school is tested at least once every three years. Since 2004, all schools have been tested three times, and two-thirds have been tested a fourth time. The rest are scheduled for a fourth testing by July.

Of all the water fountains tested for a third time in 93 Seattle schools, only seven had heightened lead levels, according to the district. Two of them were in a closed school and two of the remaining five had a level higher than 20 parts per billion (ppb).

The district’s maximum level for lead is 10 ppb, and Tacoma’s safety standard is 20 ppb. The Environmental Protection Agency’s action level is 15 ppb.

Of the 3,913 drinking water sources in Seattle schools tested as of June 30, 2015, 97 percent met all of the district’s water-quality requirements. The 3 percent that did not were fixed, retested or shut off, per district policy.

“The Seattle Public Schools considers student health and safety as a top priority,” spokeswoman Stacy Howard said in a prepared statement. “Over the last several years we have adopted and implemented a set of rigorous standards which have set nationally recognized standards for safe drinking water quality in public schools.”

A list of each Seattle school’s water-quality test result is available on the district website.

On Bainbridge Island, old water fixtures were replaced at an elementary school last month after high lead levels were detected in its water, with high levels ranging from 20 ppb to 384 ppb.

Tukwila last took extensive samples from water fountains and classroom sinks in 2006 and is planning another full range of testing this summer. District spokeswoman Sara Niegowski said that because the city has kept the same drinking-water source and the district’s pipes are up to code, “we have confidence in the continuity of water quality.”

Because most schools get water from public water systems, they are not required to comply with the federal Lead and Copper Rule, which regulates lead and copper concentrations in drinking water, according to the Washington State Department of Health.

In Tacoma, the school district informed parents on Monday of high levels of lead found at two elementary schools, Mann and Reed. On Monday night, it discovered the test reports at four other schools while reviewing records.

The district said high levels of lead were found in isolated locations at Whittier, DeLong and Manitou Park elementary schools as well as the Madison Head Start program during the May 2015 tests. But a news release says, “It does not appear that any steps were taken to correct the problems at those locations.”