Reduce groundwater withdrawals by implementing voluntary, economic, and/or mandatory water conservation measures. Saltwater intrusion caused by over pumping has already occurred and resulted in the closures of groundwater extraction wells on the Reservation. If excessive drawdown of groundwater continues, the Reservation’s water supplies may become more vulnerable to potential contamination resulting from sea level rise. The Lummi Water Conservation Plan (2004) identifies several avenues to reduce water demand and improve water use efficiency that may be implemented or expanded to reach this goal, including: (1) voluntary measures, (2) economic measures, and (3) mandatory measures. Voluntary water conservation measures include providing public education and outreach, installing water efficient fixtures (e.g., low-flow faucets, showerheads, and toilets) and appliances, preventing and fixing water leaks, and landscaping with native plants and drought-tolerant vegetation. Economic water conservation measures are primarily focused on adopting a water rate structure that encourages conservation (e.g., more expensive at certain usage levels and/or time periods). Mandatory water conservation measures authorized pursuant to the Water Resources Protection Code (LCL Title 17) may be exercised during droughts or other water supply emergencies and may include restricting nonessential water uses such as lawn watering, car washing, filling swimming pools, washing sidewalks, and irrigating golf courses.