Turn your well test into a treatment plan

Type in the numbers from your lab report. Leave blank anything you didn’t test. You’ll get what needs treating, what doesn’t, and the order to install equipment in, so nothing upstream ruins what comes after it.

Bacteria

Total coliform

Not tested Absent Present

E. coli

Not tested Absent Present

Bacteria came back before?

Yes, after shock chlorinating

Stains, smell and corrosion

IronFe. EPA aesthetic limit 0.3

mg/L

ManganeseMn. Aesthetic limit 0.05

mg/L

Hydrogen sulfideH₂S. Leave blank if only smelled

mg/L

pHNeutral is 7. Normal range 6.5–8.5

TanninsTea-colored water

mg/L

Total dissolved solidsTDS. Aesthetic limit 500

mg/L

HardnessPick the unit your report uses

Rotten-egg smell

None Hot water only Hot and cold

Health contaminants

Nitrate (as N)EPA limit 10

mg/L

ArsenicEPA limit 10 µg/L (0.010 mg/L)

µg/L

UraniumEPA limit 30

µg/L

LeadNo safe level; EPA action level 15

µg/L

Your home

Bathrooms

People in the home

Nothing you enter leaves your browser. This is general guidance based on EPA limits and extension-service advice, not a substitute for a water treatment professional.

Well Water Filter Systems

Test first, then treat the right thing in the right order.

Private wells aren’t regulated by the EPA, so testing and treatment are up to the owner. For health questions about your water, contact your state health department or a state-certified lab.

Related sites

Sulfur Water Filter
Rotten-egg smell, diagnosed step by step
Well Water Softener
Softener sizing for hard well water

Some links are affiliate links: if you buy through them we may earn a commission, at no extra cost to you. This doesn’t change what we recommend. Information here is general guidance, not a substitute for a certified lab test or a licensed water treatment professional. © 2026 Well Water Filter Systems.