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Filter selector: what your lab report calls for

Enter the numbers from your lab report. Leave a field empty if it wasn't tested. Nothing is sent anywhere; the calculation runs in your browser.

  1. 1 Enter your numbers
  2. 2 See what to treat, in order
  3. 3 See which reviewed systems fit

Start with my numbers No lab report yet?

Reviewed Oct 31, 2026 · 23 sources · How we research

Your lab results

Units as on most US lab reports. Empty means not tested.

1 Health-related results
2 Stains and smell
3 Hardness, pH and your home

Runs in your browser. Nothing is sent or stored.

No lab results yet?

Two honest ways to get your numbers.

We may earn a commission if you buy through our links. It doesn't change the result.

Order now: the test is part of the order

For well systems, SpringWell adds its lab test (Level 1 + Bacteria, $134.25) to the same checkout. It holds the order until your results are in, and if the system isn't compatible with your water, it cancels the order and refunds the system. The test itself isn't refundable2, 4.

  • One order, one step
  • SpringWell checks the fit before anything ships
Order with SpringWell's test

Or test independently first

A state-certified lab gives you a neutral answer you can use with any brand: one Wisconsin lab charges $78 for a basic homeowner panel and $75 for metals including iron and manganese, $153 together, against $134.25 for SpringWell's test2, 10. Bring your numbers back to the selector above.

  • Independent result you can use with any brand
  • Also tells you whether you need a whole-house system at all
How to test

Testing first? Take the checklist with you

A short printable list of what to ask the lab for, how to take the sample, and which numbers to bring back here. Print it or save it as a PDF.

Open the printable checklist

How the selector decides

The same rules as our guides, applied to your numbers.

  • Benchmarks: EPA standards.11, 12 Bacteria, nitrate and arsenic are flagged first because they are health issues.
  • Treatment order (our summary of extension and state guidance): sediment filtered out first, pH corrected before other treatment, iron/manganese/sulfur removed before the softener, UV last.13, 14, 16, 19
  • Product fit uses the manufacturers' own stated limits: SpringWell WS up to 7 ppm iron, 8 ppm hydrogen sulfide, 1 ppm manganese, pH 6.5–10;2 Aquasana's UV needs iron below 0.3 ppm, manganese below 0.05 ppm and hardness below 7 gpg, and the Rhino Well is sized for up to 2.5 bathrooms.5, 7
  • Result notes (anode rod, nitrate and infant formula, arsenic speciation, softener after iron) follow extension and state health guidance.14, 15, 16, 17, 18, 19, 20

Where to next

Sources (23) · checked Oct 31, 2026
  1. CDC: CDC, Guidelines for Testing Well Water (2024-07-01; checked 2026-10-31)
  2. SpringWell: Whole House Well Water Filter System (WS1/WS4) product page (seen 2026-10-31)
  3. SpringWell: Warranty (seen 2026-10-31)
  4. SpringWell: Shipping, returns and refunds (free shipping to the continental US only) (seen 2026-10-31)
  5. Aquasana: Rhino Well Water with UV product page (seen 2026-10-31)
  6. Aquasana warranty: WH-WELL-UV warranty (PDF) (seen 2026-10-31)
  7. Aquasana UV manual: AQ-UV-SF/MF installation manual (PDF) (seen 2026-10-31)
  8. Aquasana: Refunds and returns (seen 2026-10-31)
  9. Penn State Extension: Penn State Ext., Tips for Buying Water Treatment Equipment (2026-07-01; checked 2026-10-31)
  10. UW–Stevens Point lab: UW–Stevens Point WEAL, 2026 Analysis Price List (valid to 2026-12-31; checked 2026-10-31)
  11. EPA: EPA, National Primary Drinking Water Regulations (2026-08-31; checked 2026-10-31)
  12. EPA: EPA, Secondary Drinking Water Standards (2026-05-26; checked 2026-10-31)
  13. Virginia Cooperative Extension: Virginia Tech/VCE 442-670, Household Water Treatment (2024-10-22; checked 2026-10-31)
  14. Penn State Extension: Penn State Ext., Iron and Manganese in Private Water Systems (2025-05-29; checked 2026-10-31)
  15. Penn State Extension: Penn State Ext., Hydrogen Sulfide in Water Wells (2024-12-10; checked 2026-10-31)
  16. Penn State Extension: Penn State Ext., Water Softening (2025-09-08; checked 2026-10-31)
  17. UGA Extension: UGA Ext. C858-4, Shock Chlorination (2026-04-17; checked 2026-10-31)
  18. Minnesota Dept. of Health: Minnesota DOH, Nitrate in drinking water (2026-06-05; checked 2026-10-31)
  19. Connecticut DPH: Connecticut DPH, Publication 18: pH-Acidity of Private Wells (May 2009; checked 2026-10-31)
  20. Maryland MDE: Maryland Dept. of the Environment, Arsenic Water Treatment for Individual Wells (hosted by UMD Ext.) (Feb 2008; checked 2026-10-31)
  21. Aquasana: 20" Pre-Filter Replacement, 3 pack ($36.99; each lasts up to 2 months) (seen 2026-10-31)
  22. Aquasana: Post-Filter Replacement ($36.99; 6 months) (seen 2026-10-31)
  23. Aquasana: UV Replacement Lamp ($125.99; 12 months) (seen 2026-10-31)