After a water well is drilled, the Department may nominate it for ongoing monitoring (observation) of water level and salinity. In this case, the Department issues an identifying Obswell number and associates it with an Obswell Network. The Obswell number is in addition to the water well's identifying Unit Number. Not all water wells are monitored.

Observation wells (obswells) are important for monitoring trends in water and/or salinity levels across the State. Each Obswell Network focuses on a region in the State or on a specific aquifer.

An obswell number consists of the following:

three character code identifying the Hundred map area in which the water well is located
three digit number unique within the Obswell Network.

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General Terms

General terms