Survey4Water Announces New Use for Active Sonar in Finding Underground Water By Send2Press Newswire on November 15, 2011 in California, Press Releases, Real Estate, Science, Water and Wastes WILLITS, Calif., Nov. 15, 2011 (SEND2PRESS NEWSWIRE) — Survey4Water, a full service water resource company, announced this week that it is taking an old technology – active sonar – and applying it to a new use – locating underground water. Continue Reading