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The average -annual ground- water recharge to the Edwards aquifer in the San Antonio area, Texas, from 1934 through 1978 was 587,200 acre- feet. The recharge in 1978 was 502,500 acre-feet, ending a trend of above average recharge that began i n 1968.  A maximum annual recharge of 1,711,200 acre- feet occurred in 1958, and a minimum annual recharge of 43,700 acre-feet occurred in 1956.

A maximum annual discharge of 960,900 acre- feet occurred in 1977, and a minimum annual discharge of 388,800 acre- feet occurred in 1955. The maximum annual discharge by wells was 431,800 acre- feet in 1978, which is a record high for the 1934-78 period.

Although water levels in wells in the Edwards aquifer showed a general decline in 1978, the volume of ground water in storage in the aquifer was above average.

Analyses of water samples from 72 wells and 3 springs show no evidence of significant degradation of water quality in the Edwards aquifer, and the data show no trend of degradation in water quality.