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Guides and explanations for water reports.

Find your public water system, learn how to read an annual report, or look up a name or term such as lead, chlorine, or hardness.

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What would you like to understand?

Choose a guide for a task, or browse explanations of names and terms in your report.

Find a system or read a report

Follow guides to confirm your provider, read an annual report, and understand what public records can show.

Browse lookup and report guides

Contaminants and treatment terms

Look up names such as lead, nitrate, or chlorine and learn how to read their results.

Browse contaminants

Water characteristics and report terms

Understand hardness, pH, minerals, and other terms found in water reports.

Browse report terms

Featured guides

Lookup and report guides

These guides explain lookup steps, report reading, data limits, violation language, and provider questions without treating missing data as a household-level conclusion.

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How to read a water quality report

A plain-English walkthrough of Consumer Confidence Reports, including report years, detected contaminants, legal limits, violations, and source notes.

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How to look up your drinking water system

Start with a utility bill, PWSID, state lookup tool, or official report so you can find the public water system behind a city or provider name.

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Detection vs. violation vs. advisory

A careful guide to three different water-record terms, what each one can mean, and what official source to check next.

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What public water data can and cannot tell you

What official public water records can help you check, what they cannot prove, and why missing data needs cautious interpretation.

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How to ask your water provider about testing

Focused questions to ask a utility or water provider about reports, testing, notices, PWSID, and where to verify official records.

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What a drinking water violation means

How to separate monitoring, reporting, treatment, and health-based violation language before drawing conclusions.

Next steps

Use guides with browse pages

Move from the guide library to source-backed records, examples, and site limitations.

New Mexico state page

Use a state hub with official New Mexico lookup guidance and available system records.

View New Mexico state page

Nevada state page

Use a state hub with Nevada Drinking Water Watch guidance and available system records.

View Nevada state page

Methodology

Review how source records and limitations are handled.

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