SAWS: Pesticides
Aquifer Beaker

Edwards Aquifer

Aquifer Level 681.1'
6/19/19 - Official

The Edwards aquifer and its catchment area in the San Antonio region is about 8,000 square miles and includes all or part of 13 counties in south-central Texas.

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Year-Round Watering Hours

Watering with an irrigation system or sprinkler is allowed any day of the week before 11 a.m. or after 7 p.m.

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Aquifer Level 681.1 | Year-Round Watering Hours

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Water Quality


If you're like most people, your first reaction is to douse creepy crawlers with bug spray. Not a good idea. In addition to killing offending bugs, pesticides can also harm helpful insects and animals. Plus, when these chemicals show up in our lakes and streams, the water supply is at risk. So how do you get pests to bug off? Sometimes a non-chemical method of control is just as effective as a chemical alternative. And for the less squeamish, a good old-fashioned swat or stomp will usually do the trick.


Eco-friendly H2O Tips

Avoid killing everything. Use the most species selective pesticide available.

Don't improvise. Follow instructions and use only the amount necessary. Doubling the mix doesn't double the effectiveness.

Never mix or store pesticides near a water source or well.

Don't apply outdoor pesticides when rain is forecasted.

Use botanical deterrents like Pyrethrum or Rotenone - they break down quickly and don't leave a residue.

Go natural and use ladybugs and nematodes to help control certain garden pests.

Take unused pesticides to approved disposal sites. Never pour them down a storm drain or toilet.

Don't overwater your lawn and create runoff that carries fertilizer and pesticides into storm drains.

Water only as needed to avoid the necessity of fungicides.


Bonus Tip: To make insecticide soap, mix one teaspoon of dishwashing liquid with one gallon of water. Pour in spray bottle and mist plants.

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