Water & wastewater treatment handbook

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.

Name the receiving process

EPA’s industrial water-reuse resource hub covers applications including data-center cooling and manufacturing. The breadth of that directory is a reminder to identify the receiving application precisely; “industrial reuse” is not one universal water specification.

Use a three-boundary requirements record

Our proposed review separates the incoming supply, the process using the treated water, and the residual or discharge pathway. For each boundary, name the owner, the applicable requirements and the evidence still missing.

Keep the equipment water-quality requirement separate from the delivered chemical specification. The first describes what the process needs; the second describes the material supplied. The validation plan is the bridge between them, and should remain visible in the procurement record.

Write packaging into the process interface

Record delivery quantity, container configuration, unloading constraints, approved connections and receiving responsibility before requesting a quote. Ask the site team to confirm the applicable storage and handling procedure using the exact product SDS.

For residuals, identify the characterization and disposition decisions that need an environmental specialist. This library does not determine a waste classification, discharge permission or allowable destination. A sourcing comparison is incomplete while those decisions remain implicit.

Requirement → evidence → decision boundary

An editorial checklist for your review—not a table of product specifications.

What the 2026 fact sheet establishes

EPA’s April 2026 fact sheet describes updated interim guidance on PFAS destruction and disposal, drawing on information reviewed through September 2025. It identifies a new technology-evaluation framework and continuing data gaps. The guidance does not establish destruction or disposal requirements.

That scope matters: this is not a list of universally approved technologies or a finding that any advertised removal percentage proves destruction. This brief is based on the fact sheet, not an independent technical assessment of the full report.

Use a claim-to-evidence ledger

Our editorial evaluation framework separates the stated claim, the measurements supporting it and the unmeasured pathways. Ask a technology provider which analytes were measured, by which methods, in which input and output streams. Record detection or reporting limits and the study conditions.

If a claim says “removal,” ask where the captured material goes. If it says “destruction,” ask what evidence supports that stronger conclusion and how transformation products and other output streams were evaluated. Do not replace an expert assessment with a single headline percentage.

• Was the result obtained in a laboratory, pilot or operating facility?
• Which outputs and residuals were included in the evaluation?
• What data are unavailable or below the method’s reporting capability?
• Which site-specific engineering and regulatory questions remain open?

Requirement → evidence → decision boundary

An editorial checklist for your review—not a table of product specifications.