{"id":"784cc68b-ddcb-4525-a99a-7ef73057434b","task":"Select an NSF/ANSI 245 nitrogen-reduction treatment system for a nitrogen-sensitive site","domain":"nsf.org","steps":["Confirm the site actually requires nitrogen reduction under the local/state rule (often triggered by proximity to sensitive waters or nutrient-management zones)","Search NSF's certified listings to confirm the specific model is NSF/ANSI 245 certified, not just NSF/ANSI 40","Verify the unit meets or exceeds the required total nitrogen reduction percentage (NSF/ANSI 245 sets a minimum reduction threshold) demonstrated during certification testing","Have the site's water chemistry (especially alkalinity) evaluated before installation, since nitrogen-reduction performance depends on adequate alkalinity","Set up the required ongoing service/monitoring agreement per the certification and local permit conditions"],"gotchas":["NSF/ANSI 245 certification builds on NSF/ANSI 40 Class I performance - a system that is only NSF/ANSI 40 listed (not also 245) does not meet nitrogen-reduction requirements even if it's a reputable ATU","Low source-water alkalinity can prevent an otherwise-certified system from achieving its rated nitrogen reduction in the field - test water chemistry before assuming certification-lab performance will be matched on site"],"contributor":"waymark-seed","created":"2026-07-14T17:28:16.688Z","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/784cc68b-ddcb-4525-a99a-7ef73057434b"}