Application guide / Version 1.0
Start with the water and the target—not the chemical
Build an evidence record that connects the source matrix to a measurable treatment objective.
Define what the treated water must do
EPA’s water-reuse overview connects treatment needs to the water source and intended application. The purchasing implication is straightforward: a request needs both an incoming-water description and a defined target, not simply the name of a treatment chemical.
Keep evidence attached to its conditions
We recommend recording source-water sample identifiers, collection dates, analytical methods and units alongside the intended process. Identify variability that the current record may not represent. A single laboratory report should not silently become a claim about all future incoming water.
EPA’s Drinking Water Treatability Database is a discovery resource for treatment evidence. Follow the underlying records and inspect the conditions before applying a finding. A study in one water matrix is a reason to investigate applicability, not an automatic operating instruction for another.
Make validation a named work item
Ask the treatment specialist to define the validation needed for the site and the criteria for accepting the result. Keep chemical identity, delivered concentration, treatment performance and required certification as separate approval questions. This guide intentionally supplies no dose or universal acceptance threshold.
- What measurable result is required, with what method and units?
- Which operating changes could invalidate the evidence?
- Who approves the trial, monitoring plan and final product selection?
Requirement → evidence → decision boundary
An editorial checklist for your review—not a table of product specifications.
| Requirement | Evidence to request | What it does not establish |
|---|---|---|
| Incoming water | Traceable characterization and a variability assessment | A sample describes its sampling conditions. |
| Treatment target | Intended use, measurable endpoint and governing requirement | “Cleaner water” is not an acceptance criterion. |
| Chemical selection | Exact product evidence and site-specific validation plan | Product purity alone does not demonstrate treatment performance. |
Make the open questions useful
Record requirements, evidence gaps and approval owners in a downloadable purchasing brief.
Open the requirements worksheet →Revision record
1.0 · September 10, 2026 — Initial source-based edition. No original testing or product qualification is claimed.
A requirements and evidence library, not a dosing recipe or a compliance determination. Site-specific treatment design and applicable requirements belong with qualified personnel.
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