# Well water testing schedule planner

Plan a routine US annual test and flag changes that need attention now. CDC and EPA recommend annual baseline testing and extra testing after certain events. In Canada, follow provincial and local guidance.

Use the tool on the [web page](https://welldrillers.fyi/tools/well-water-testing-planner). It works without JavaScript.

## How to use it

1. Enter date of your last baseline laboratory sample.
2. Choose has something changed since that sample?.
3. Read the result.

## How it works

CDC, Guidelines for Testing Well Water, fetched 2026-11-10: https://cdc.gov/drinking-water/safety/guidelines-for-testing-well-water.html . Recommends at least annual total coliform, nitrate, total dissolved solids and pH tests, and additional tests based on local conditions.

US EPA, Protect Your Home's Water, fetched 2026-11-10: https://www.epa.gov/privatewells/protect-your-homes-water . Recommends testing immediately after repairs, water changes and significant local changes. CDC also identifies pregnancy and a child joining the home.

The annual reminder adds 12 calendar months to the last sample date. A flagged event overrides waiting for that date. The tool does not set a post-disinfection waiting interval. Obtain sampling instructions from the health authority and laboratory.

Ontario, Wells on your property, fetched 2026-11-10: https://www.ontario.ca/page/wells-your-property . Recommends at least three tests a year, including spring and fall. This US annual tool does not replace that advice.

> This planner uses US CDC and EPA guidance. Follow local health advice, especially after flooding or contamination. A future reminder is not evidence that water is safe.

## Questions

### What tests belong in the baseline?

CDC and EPA list total coliforms, nitrates, total dissolved solids and pH. Ask the health authority which other tests apply locally.

### Can this confirm water is safe?

No. It is a reminder tool. Use a certified laboratory and ask your health authority to interpret results.