§ 9.121.060. Irrigation requirements.

(a)

All irrigation systems shall be designed to prevent runoff, overspray, low-head drainage and other similar conditions. Soil types and infiltration rates shall be considered when designing irrigation systems. Irrigation systems shall be designed, constructed, managed, and maintained to achieve the maximum possible overall efficiency.

(b)

A dedicated landscape water meter shall be installed for each landscape project greater than 5,000 square feet, except for single-family residences. Dedicated landscape water meters are also highly recommended for landscape areas less than 5,000 square feet to facilitate water management.

(c)

All irrigation systems shall include:

(1)

A SMART irrigation controller, or other equivalent technology which automatically adjusts the frequency and/or duration of irrigation events in response to changing weather conditions. The planting areas shall be grouped and irrigated in relation to hydrozones based on similarity of water requirements (i.e., turf separate from shrub and groundcover, full sun exposure areas separate from shade areas; top of slope separate from toe of slope);

(2)

Anti-drain check valves to prevent low-head drainage in sprinkler heads;

(3)

A pressure regulator to prevent the static water pressure from exceeding the maximum recommended operating pressure of the irrigation system; and

(4)

Sensors (rain, freeze, wind, etc.), either integral or auxiliary, that suspend or alter irrigation during unfavorable weather conditions. Irrigation should be avoided during wind, freeze, or rain.

(d)

Overhead irrigation shall be scheduled between 8:00 p.m. and 10:00 a.m. unless weather conditions prevent it. Operation of the irrigation system outside the normal watering window is allowed for auditing and system maintenance.

(Ord. No. 313, exh. A(9.06.095.060), 12-15-2009; Ord. No. 315, exh. A, 4-20-2010)