Quick Answer
To deter local wildlife from accessing cisterns, use a combination of physical barriers, repellents, and exclusion methods. Buried concrete cisterns are particularly susceptible to burrowing animals. Implementing these methods can help protect the cistern and the water it holds.
Physical Barriers
Buried concrete cisterns should be surrounded by a 4-foot wide, 12-inch deep trench filled with compacted gravel or crushed stone. This will prevent burrowing animals such as raccoons, skunks, and rodents from digging under the cistern. Additionally, install a 3-foot tall, 1-foot wide fence around the perimeter of the cistern, using materials like chicken wire or hardware cloth to prevent climbing.
Repellents and Exclusion Methods
Use a combination of repellents and exclusion methods to deter wildlife from accessing the cistern. Spraying the fence and surrounding area with a commercial raccoon or skunk repellent can be effective. To exclude animals, install a roof or lid on the cistern, and consider installing a motion-activated sprinkler to scare away any animals that do manage to get close. Seal any holes or gaps in the cistern or surrounding fence to prevent re-entry.
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