Primary public records first
Utility Consumer Confidence Reports, IDEM records, EPA datasets, public notices, laboratory results, and official source-water descriptions take priority.
Editorial methodology
How We Research Indiana Water
A transparent method for separating verified records, address-level uncertainty, treatment education, and marketing claims.
Evidence hierarchy
What we use—and what we refuse to imply.
Sample context stays attached
We preserve the system, PWSID, date, location, unit, reporting limit, and raw-versus-finished distinction whenever a result is discussed.
Treatment claims require proof
Media descriptions are not enough. The complete model, certification or performance data, flow, capacity, conditions, and maintenance matter.
City-page rules
Every city page carries a boundary warning.
- A postal city is not automatically a utility service area.
- A countywide statement is not assigned to every city.
- A neighboring utility's result is not copied onto another system.
- A raw-water detection is not described as a finished tap-water result.
- A one-time sample is not presented as a year-round average.
- A non-detect means below the method's reporting threshold, not absolute zero.
- System-wide compliance does not answer every premise-plumbing question.
Source hierarchy
Primary and authoritative records come before commercial summaries.
Research follows this order whenever the information is available.
- Serving utility and current Consumer Confidence Report for supplier, source, treatment and regulated-water context.
- Indiana IDEM and EPA records for PWSID, compliance, UCMR and public-system identity.
- Official local government or utility notices for current operational or service-area information.
- Certified laboratory results for property-specific questions that system-level reports cannot answer.
- Independent comparison resources such as EWG, clearly labeled and linked rather than copied.
- Zero Trace Water educational material for treatment concepts, installation, certifications and maintenance—not as a substitute for local measurement.
See the research team page for byline meaning and the corrections policy for material updates.
Primary statewide and national references
- Indiana IDEM Drinking Water Branch
- Indiana public-water system resources and Drinking Water Viewer
- IDEM 2025 Annual Compliance Report
- EPA UCMR 5 Data Finder
- EPA Consumer Confidence Report information
- EPA lead in drinking-water information
- NSF consumer water-treatment resources
Corrections
Send source corrections through the contact form. Include the city, current utility, PWSID, direct official source, and the statement that needs review. We do not promise immediate changes, but material corrections should be documented and reviewed.