Meter Accuracy Verification Testing FAQs

Edwads Aquifer Authority (EAA) permit holders authorized to withdraw more than 28-acre-feet of groundwater annually are required to perform an accuracy verification on their meter(s). Any meter not achieving a certified (+/-) 5% error rate cannot be used and must be either repaired, replaced, or calibrated. In order to help facilitate the process, the EAA has provided a list of potential vendors who are currently available to provide this service. The EAA does not endorse these services/vendors, and a permit holder is not required to utilize the services of a listed vendor. The list will be updated on the EAA's website anytime a new vendor informs the EAA that he or she might be available to provide accuracy verification testing services to the public. Additional information regarding meter accuracy verification testing can be obtained by contacting a member of the EAA's Meter Program at (210) 222-2204 or (800) 292-1047. You can also send an email to

Municipal and Industrial users authorized to withdraw 28 acre-feet or more annually are required to have their meters tested for accuracy.

According to EAA rules, accuracy verification tests for meters should occur every four years after meter installation.

If the meter was installed before January 1, 2010, then an accuracy test must be performed before December 31, 2013, and at least every four years thereafter.

No. However, proof of accuracy verification (invoice, certificate, etc.) is required to be made available to EAA staff if requested. The EAA does not require permit holders to submit the testing results, but highly encourages notification of the results once the testing has been completed.

A reminder will be mailed to each permit holder before his or her meter verification is due.

Municipal and Industrial permit holders may contact a vendor from a list provided on the EAA's website, or they may solicit these services from another source. Each well owner is responsible for scheduling his or her own accuracy verification.