Evidence Based Home

Molds & Moisture

Sep 21, 202611 min

How Fast Does Mold Grow After Water Damage?

Sep 21, 202611 min

How to Tell If You Have Mold in Your House: Visible and Hidden Signs

“Microbial growth” is a broad report term. Check for moisture and affected materials before deciding whether cleanup, further inspection, or sampling is needed.

Sep 21, 202610 min

Microbial Growth in a House: Is It Mold?

Mold and mildew are commonly described differently, but the practical response depends on moisture, material, extent, and location.

Sep 21, 202610 min

Mold vs. Mildew: How to Tell the Difference and What to Do

Indoor Air Quality

Comparison of prefilter, HEPA filter, and activated-carbon maintenance signs, showing that each filter requires a different replacement decision.

Sep 22, 202612 min

How Often Should You Replace an Air Purifier Filter?

Operating guide showing when to run an air purifier in a bedroom, occupied room, during cooking, and during wildfire smoke.

Sep 22, 202611 min

How Long Should You Run an Air Purifier?

Room diagram showing an air purifier in an open occupied area with clear airflow and warning against placement behind furniture, against curtains, or in a tight corner.

Sep 22, 202614 min

Where Should You Place an Air Purifier for the Best Results?

Comparison showing a HEPA filter capturing airborne particles and activated carbon adsorbing certain gases and odors.

Sep 22, 202613 min

HEPA vs. Activated Carbon Filters: What Does Each Remove?

Water Quality & Safety

Test private well water annually for total coliform bacteria, nitrate, pH, and total dissolved solids. Test again after events that may affect the well.

Sep 23, 202612 min

Private Well Water Testing: What to Test and When

Start with service-line records and correct testing. Use exposure controls while arranging permanent correction when a lead source is confirmed.

Sep 23, 202614 min

Lead in Drinking Water: How to Test and Reduce Exposure

Four-step guide to choosing a home water filter by identifying the water problem, selecting point-of-use or whole-house treatment, verifying the exact contaminant-reduction claim, and planning maintenance.

Sep 23, 202613 min

How to Choose a Water Filter for Your Home

Decision guide showing when tap-water testing may be useful for public-water customers and private-well owners based on plumbing concerns, flooding, repairs, water changes, and local risks.

Sep 23, 202612 min

Should You Test Your Tap Water? What Home Tests Can Tell You