Economic allocation methodology. Charging tenants or units individually for water usage in multiunit buildings, §12-5-180.1. 1272 INDEX DRINKING WATER —Cont’d Efficiency and effectiveness of water use. Minimum standards and best practices for improving. Adoption by division, §12-5-4.1. Emergency orders, §12-5-187. Emergency provision of water, §12-5-183. Emergency water supply plan.