The Upper Guadalupe River Authority

NEVER swim in stagnant water, or water that looks 'polluted'
Take "No Swimming" signs seriously
Avoid swallowing water when swimming
Avoid getting water into your nose when swimming, especially during periods of high temperatures
Use ear plugs and swim goggles, or a mask, if you tend to get ear, or eye infections after swimming
NEVER allow a child to swim in a chlorinated pool or natural water source while ill with diarrhea – even while wearing disposable swim pants or plastic diaper covers
Children with other illnesses (fever, vomiting, etc.) should also stay home
NEVER drink, or cook with, untreated water from a natural water source
Do not swim in ponds or lakes that are actively used by livestock

Injury tips:

NEVER dive into shallow water, or water where the bottom is not visible
NEVER use alcohol or drugs while swimming or boating
NEVER leave children unattended near a water source for even SECONDS at a time
NEVER swim alone, no matter how good a swimmer you are
Drink at least one cup of water (8 oz) every 30 minutes
Avoid alcoholic and caffeinated beverages because these are dehydrating
Limit time spent in the sun between 10:00 a.m. and 2:00 p.m.
Children and adults should use a sunscreen with an SPF of 15 or higher as per label directions
Do not attempt to jump in and save a drowning victim unless certified in lifesaving
Try to reach the victim with anything they can hold on to that can be used to pull them to shore
Throw anything to the victim that will float and that can be hung on to until rescue is made
Get out of the water and move well away from any water source before, or during, a thunderstorm of any size
Wear eye protection at all times during sun exposure
Wear foot protection to prevent cuts and abrasions
Wash all cuts well with warm soap and water, apply antibiotic ointment and cover well before entering recreational waters