On Jun 24, 8:05*pm, Joe wrote:
I have a city sewer in front of my house that has standing water and
has become a breeding ground for mosquitoes. Is there anything I can
add to the water to negate it as a breeding ground?

Same problem here, my city sanitarian gave me a card of BT donuts and
I hang a few on some string so they stay in the basin and don't wash
away.

BT is a bacteria and there is a strain for caterpillars and a strain
for mosquito larvae, kills em .