The marked improvements also allowed it to avoid a so-called takeover by the Texas Education Agency, because of several under-performing schools that were granted waivers because of Harvey.
The district said 91 percent of its schools earned a "met standard" rating by the TEA. That translates to 251 out of its 275 rated campuses.
Fifteen campuses remain on "improvement required" status from the prior year. However, the district said it is the lowest number of HISD campuses on the designation in the past six years.
The new accountability system was met with mixed response. Grenita Lathan, the interim HISD superintendent, said parents can be alarmed if a school slips below a B.
"Anytime a label or a rating is placed on a school, it's concerning. But we, as a district, have to do everything we can to educate parents and provide students with a quality education," said Lathan on Wednesday.
The ratings are based on STARR test results, and some schools have seen dramatic improvements. Worthing High School was one of the most improved, but even so, Lathan said it would receive an individual D-rating.
RELATED: The ABCs of the new school accountability system
"We're putting a lot of resources into our schools, from staff, to students. We're also hosting a 'Parents University' to get them involved," she said.
TEA Commissioner Mike Morath, who appeared at Dawson High School to commend Pearland ISD for its A-rating, said the accountability system "isn't a value judgement about students, but value information about how you support students."
He added, "If you can embrace that and embrace that continuous improvement, that's half the battle."
HISD is also facing another year of having to send millions of dollars back to the state, in what's called "recapture."
State Senator Paul Bettencourt said he expects the bill to be lowered, but he also plans to file a bill to reshape the HISD school board.
"I believe we shouldn't have only district trustees who represent their individual districts, but at-large members as well," he said. "That way, it will be a larger approach, to all the schools in HISD."
Follow Deborah Wrigley on Twitter and Facebook.