EMB ERJ 170/175 ER/LR
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Loss Of Aircraft Control; Ground Event / Encounter Weather / Turbulence
Flight Crew Regained Aircraft Control
Weather
This flight was significantly delayed coming from ZZZ1-ZZZ. While awaiting the arrival of the aircraft I called my Dispatcher to double check latest conditions in ZZZ1. She informed me that Runway XX was up to a 5-5-5 braking action and that several arrivals were coming in with no issues. We quick turned in ZZZ we were the crew taking over the flight in ZZZ. Turbulent flight into ZZZ1; uneventful until landing rollout. Weather had been Freezing rain and freezing drizzle all day in ZZZ1. During landing rollout at approximately 30 kts. Tower told us to exit at Taxiway XX and contact Ground. We began to slide straight ahead on the runway I released the brakes and let the aircraft roll down the runway; we advised tower unable we will take exit XY. All taxiways were apparently closed except Taxiway XX or down to the end of the runway. We were instructed to continue down to the end of runway and exit onto Taxiway XZ. Upon reaching the end and beginning to slow about 5-10 kts ground speed the aircraft slid more significantly this time. We were able to regain traction after stopping briefly. We luckily did not slide off the runway nor taxiway. We reported braking action poor to ZZZ1 Tower which they immediately relayed to their Operations vehicles. I don't know the last time the runway was treated prior to our arrival; but it appeared to be about an inch of slushy icy accumulation. OAT was -1C. The walkways and ramps used to deplane passengers were treated with ice melt but extremely slick and dangerous; we had several passengers lose their footing while exiting the aircraft and on the ramp.I was hesitant based on my gut feeling for accepting the flight. I have experienced 5 winters in ZZZ1 in my 5 years at (Airline); each time freezing rain or drizzle is involved has been this exact experience. I understand that we want the operation to get our guests to their destination but I feel no one should have been operating into ZZZ1 today. The National Weather Service had issued an ice storm warning which was definitely evident on our near runway excursion. Next time I will trust my gut and refuse the flight in the interest of Safety. These ice storms are very dangerous and risky to operate in; I hope we can definitely avoid this in the future.
E175 Captain reported poor braking action on landing rollout due to ice and slush build up on runway.