I chuckled at Ken's comment at first, but then I started thinking about how horrible the waterways were in the late 60s early 70s. There has been a great improvement in reducing water pollution since then, but there is much more needed. Ironically some of the biggest offenders in my area involving water pollution are municipality's waste water (raw sewage) discharge.
Not so funny.
Carl

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission