The Clean Water Act is 40 years old (about the same as this IW contributor). Check out these articles to learn something of what has and hasn’t been accomplished with the act.
Clean Water Act celebrates 40 years of water improvements (Milwaukee Journal-Sentinel, Oct. 2, 2012)
Happy 40th Birthday, Clean Water Act! (Campana, M., American Water Resources Association Water Resources Blog, Oct. 18, 2012)