SECTION 1. Section 2 of Chapter 21G shall be amended to strike the definition of safe yield in its entirety and replace with the following and further add a new definition for stress basin: -

''Safe yield'', the maximum dependable withdrawals that can be made continuously from a water source including ground or surface water annually without depleting the source beyond its ability to be replenished naturally. Provided, however, that such dependability is a function of storage and drought probability.

“Stress basin”, is defined as a basin or sub-basin in which the quantity of streamflow has been significantly reduced, or the quality of the streamflow is degraded, or key habitat factors are impaired.

SECTION 2. Section 5 of Chapter 21G shall be amended to add the following: -

The Department of Environmental Protection (DEP) shall re-calculate safe yield for each basin in Massachusetts, based on seasonal supply in the summer months, using data from no earlier than the past 3 years, and taking into account the existence of reservoir storage, or lack thereof.

SECTION 3. Section 5 of Chapter 21G shall be amended to add the following: -

The Department of Environmental Protection (DEP) shall calculate safe yield for each of the sub-basins in Massachusetts. Stream Flow calculated by USGS shall be used in this analysis.

SECTION 4. Section 15 of Chapter 21G shall be amended to insert the following after the words “pursuant to this section” as follows: -

Stream flow shall be used in the calculation of drought.  A drought level of 4 or 5 in stressed basins or in identified flow depleted basins and sub-basins shall trigger water conservation measures in the watershed. All registrants and permit holders shall be subject to these water conservation measures. In addition, local Boards of Health shall require permits for wells and shall implement water conservation measures for these wells during drought or in identified flow depleted basins.

SECTION 5. Section 20 Chapter 21G shall be amended to insert the following: - 

Local boards of health or other permitting bodies that permit private wells in municipalities shall provide annually by December 31st, a report of well permits to the Department of Environmental Protection (DEP).