It is one of several states with bills in the works, in addition, governors in a handful of other states have signed executive orders preventing state contracts with ISPs who don't hew to similar prohibitions.
In his statement, Inslee said that consumer protection is "at the core of our action today".
In the meantime, Washingtonians should benefit from special net-neutrality protections in a bill introduced by state Rep.
Back in December, the Federal Communications Commission voted to repeal the net neutrality laws enacted by the previous administrations, and to give carriers or other internet service the freedom to prioritize traffic from this or that source, including their own services. However, the FCC's order bars state laws from contradicting the federal government's approach, setting up the possibility that state efforts like Washington's will wind up in court.
Washington's new law, House Bill 2282, reinstates those net neutrality rules at the state level and protects citizens in the state from manipulated broadband speeds and measures that would limit certain types of content.
A bipartisan majority of the Washington Legislature approved state standards for internet service providers such as Comcast, Verizon and CenturyLink. Nevertheless, consumers across the political spectrum were angered by the FCC's vote to repeal the rules, with many expressing concerns that the end of net neutrality could dampen free speech, lead to higher costs for consumers and allow ISPs to decide what services they use on the web.
The FCC is also preparing for lawsuits over its initial repeal of net neutrality, which triggered Washington state to pass its own legislation.
While several states introduced similar measures this year seeking to protect net neutrality, so far only OR and Washington have passed legislation.
Providers are also required to disclose information about their performance and network management practices.
Washington state was among more than 20 states and the District of Columbia that sued in January to try and block the FCC's action.
The law essentially reproduces the FCC's net neutrality policy that went into effect in 2015.