The sump pump danger

Please examine closely:

Potential mosquito breeding ground, right? Nice dirty stagnant water, gathering at the bottom of a bulkhead to be pumped out.

Can mosquitoes fly in? Certainly; no bulkhead is constructed tight enough to keep out a small insect.

Has the homeowner taken the right precautions?

Yes! Note the Bti larvicide tablet floating on the left side. Very good!