Evidence of the negative effect of excess fertilizer nutrients and herbicides.

Fertilizers move from lawns to streets to storm drains to lakes in flushing rains. 

Herbicide 2,4-D in fertilizers whitens stalks and deforms foliage.

Emerging macrophytes planted near storm drains suffer the most. 

Even hearty stand of cattails may be lost.  Filamentous algae mats proliferate in the hot weather from excess phosphorus entering the lake from fertilizers.