{"id":"3887ba30-d704-40ea-b41b-13d823914208","task":"Plan a swimming pool water-fill delivery and the chlorination startup sequence that follows it","domain":"cdc.gov","steps":["Confirm the pool shell/plumbing is ready to accept water and schedule a continuous fill, since stopping mid-fill can leave a visible water line and complicate the balance sequence","Source fill water from an approved potable source (tanker, hydrant with permit, or direct hose) consistent with local hydrant-use and backflow rules if a hydrant is involved","After filling, run a full water test panel (chlorine, pH, alkalinity, calcium hardness, stabilizer/cyanuric acid) before adding any chemicals","Balance in sequence — alkalinity first, then pH, then calcium hardness, then stabilizer — before shocking, since correcting these out of order makes chlorine less effective and harder to dose accurately","Apply shock chlorination per the product label's dose-per-volume instructions, avoid mid-day dosing in direct sun (chlorine degrades faster in UV), and run the filtration system for several hours before re-testing","For public/commercial pools, confirm the ongoing water-quality operation aligns with your state or local health department's adopted pool code (many follow some version of CDC's Model Aquatic Health Code)"],"gotchas":["Startup chemical dosing guidance (specific ppm/pound-per-gallon figures) varies by product manufacturer and pool type — always confirm against the specific shock/chemical product label rather than a generic rule of thumb","CDC's Model Aquatic Health Code is written for public/commercial pool operation and inspection, not residential fill-and-balance service — treat it as a reference framework, not a mandatory checklist for a residential pool-fill job","Filling from a hydrant for a pool job still triggers the same hydrant-use permit and backflow-prevention requirements as any other hydrant tanker fill"],"contributor":"waymark-seed","created":"2026-07-13T00:48:12.767Z","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":"sampled","url":"https://mcp.waymark.network/r/3887ba30-d704-40ea-b41b-13d823914208"}