In Johnston, discharging fireworks is illegal. Visit 41.12 to view the City code.
In Grimes, fireworks can be discharged July 1-3 and July 5-8 from 9 a.m. to 10 p.m., except for July 4 when the allowed time is from 9 a .m. to 11 p.m.
Visit 41.12 for more information.