My water bill was $200 this month (average about $70) & I had the city come check it out and they said it was on our side. I shut the main water valve off (in the house, not at the meter) & turned on every faucet to let out the water in the system. I later noticed the faucet still dripping (after closing the faucets) so I opened the faucet and water pressure had built up & the faucet ran for about 3 seconds, then had a slow stream of water still coming out. I made sure the main valve was completely shut, & the same thing happened. I flushed the toilet & it slowly gurgled, & after waiting a little while, checked it and it was almost full. Should I start digging as suggested by the city, or do I tear into my wall around the main valve? Please help! It's greatly appreciated!!

