# Water chlorination (dispensers / in-line)

**Intervention ID:** `int_chlorination`  
**Evidence strength:** strong  
**Causes:** `cause_safe_water`

## Mechanism

Chlorine at collection or in-line.

## Organizations in this catalog

- `org_givewell_all_grants_fund`
- `org_jpal_chlorine`
- `org_uduma`
- `org_evidence_action_ilc`
- `org_evidence_action`
- `org_evidence_action_safe_water`

## Citations (public evaluator pages)

- https://www.givewell.org/research/grants/evidence-action-in-line-chlorination-india-september-2023

## Evidence notes

GiveWell has funded Evidence Action Safe Water / in-line chlorination; CE $/life left null in Phase 1 without a Top Charities-style average.

## Key uncertainties

- Not a current GiveWell Top Charity; grant-level evidence only in our corpus.
- External validity across water-system types and geographies.

## Fungibility notes

Grant-funded incubation/scale; other WASH funders may exist — cite specific grant pages when claiming displacement.

## Cost-effectiveness notes (do not treat as verified without citation_urls)

GiveWell funded Evidence Action Safe Water/ILC; $/life null Phase 1.

Agents must look up `data/claims_index.json` and cite `citation_urls` before stating numbers.

## Provenance

See `docs/evaluation-provenance.md` and `data/graph/evaluations_graph.json`.

_last_reviewed: 2026-10-01_