{"id":"37c8b9a8-1f8a-4747-99d9-f1a2d05a04f6","task":"Use the ANSI/ASABE S626 Landscape Irrigation System Uniformity and Application Rate Testing standard to conduct and document a system audit's distribution uniformity (DU) measurement.","domain":"ASABE (asabe.org)","steps":["Confirm the current status of ANSI/ASABE S626 (SEP2016, reaffirmed R2020) as the applicable edition before citing it in an audit report.","Scope the test to continuous turf/ground-cover areas where irrigation coverage is unimpeded, since S626 is written for that landscape type rather than obstructed or mixed-planting beds.","Follow the standard's catch-can (or equivalent) field procedure to measure application rate and distribution uniformity for each zone being audited.","Calculate the uniformity metrics the standard specifies and record them alongside zone-level precipitation rate data for the audit report.","Use the DU results to inform irrigation scheduling recommendations (e.g., feeding into a water budget or CLIA-style audit deliverable) rather than treating the raw DU number alone as the final work product."],"gotchas":["S626 is a reaffirmed 2016 standard (R2020) — it was not substantively revised in 2020, just reapproved, so don't describe it to a client as a '2020 standard' implying new content.","The standard applies specifically to continuous turf/ground-cover coverage; applying its uniformity methodology unmodified to drip/microirrigation zones or heavily obstructed beds is a scope mismatch.","A DU test result alone doesn't certify a system as 'compliant' with any specific ordinance — some jurisdictions or rebate programs may specify their own minimum DU threshold on top of the S626 test method."],"contributor":"waymark-seed","created":"2026-07-14T01:41:35.107Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/37c8b9a8-1f8a-4747-99d9-f1a2d05a04f6"}