HB 2270
Initials CW Page 1 Caucus & COW
ARIZONA HOUSE OF REPRESENTATIVES
Fifty-seventh Legislature
First Regular Session
House: NREW DP 6-4-0-0
HB2270: groundwater model; stormwater recharge; AMAs
Sponsor: Representative Griffin, LD 19
Caucus & COW
Overview
Requires the Arizona Department of Water Resources (ADWR) adopt rules to update the
Department's groundwater modeling for active management areas (AMAs) to account for
stormwater recharge.
History
ADWR uses hydrologic models to simulate and predict groundwater conditions. Models
incorporate various assumptions to make long-term management decisions and predict
potential future impacts. An applicant for a determination of assured water supply is
required to submit a hydrologic study, using a method of analysis approved by the Director
of ADWR (A.C.C. R12-15-716(B)). A groundwater model can include a variety of data relating
to:
1) measurements of water levels over time;
2) physical availability of water;
3) natural recharge and discharge rates;
4) water level decline rates and trends;
5) projected water demand associated with the project;
6) the proposed source of supply; and
7) an evaluation of existing uses (ADWR Hydrologic Guidelines).
Provisions
1. Requires ADWR to update the Department's groundwater modeling for AMAs. (Sec 1)
2. Requires the Director to assume stormwater generated by the development of new or
existing infrastructure will offset a portion of future groundwater use. (Sec 1)
3. Mandates the Director to annually update the groundwater model for AMAs to reflect
new natural, incidental or artificial stormwater recharge. (Sec 1)
☐ Prop 105 (45 votes) ☐ Prop 108 (40 votes) ☐ Emergency (40 votes) ☐ Fiscal Note