Buying a water filter without testing first is like buying medication without a diagnosis. You might address the wrong contaminant, overspend on unnecessary filtration, or worse, miss something dangerous that your filter does not cover.
Water testing options range from $10 DIY strips to $700+ comprehensive lab panels. The right choice depends on what you need to know and how much precision matters.
| Feature | SimpleLab (Tap Score) | MyTapScore.com | National Testing Labs | DIY Strip Kits | Home Digital Meters | |---|---|---|---|---|---| | PFAS Testing | Yes ($250+) | Yes ($250+) | Yes ($200+) | No | No | | Lead Testing | Yes | Yes | Yes | Yes (limited accuracy) | No | | Bacteria (Coliform/E.coli) | Yes | Yes | Yes | Yes | No | | Heavy Metals Panel | Yes | Yes | Yes | No | No | | VOCs/Pesticides | Yes | Yes | Yes | No | No | | TDS Reading | Included | Included | Included | No | Yes ($15-$30) | | Lab Accreditation | EPA-certified | EPA-certified | EPA-certified | None | None | | Turnaround Time | 5-10 business days | 7-14 business days | 7-10 business days | Instant | Instant | | Price (Basic Panel) | $40-$80 | $50-$100 | $60-$100 | $10-$30 | $15-$30 | | Price (PFAS Panel) | $250-$400 | $250-$350 | $200-$350 | N/A | N/A | | Price (Comprehensive) | $400-$700 | $450-$600 | $350-$500 | N/A | N/A |
SimpleLab operates under the Tap Score brand and offers the most user-friendly certified testing experience. They mail you a collection kit with pre-labeled vials, you fill them from your tap, and ship them back in the prepaid mailer.
Results arrive in 5-10 business days via an online dashboard that explains each result in plain language, compares against EPA limits, and suggests next steps.
Core test packages: - Essential ($50): Metals, minerals, bacteria basics - Advanced ($180): Adds VOCs, pesticides, disinfection byproducts - PFAS add-on ($250): Tests for 30+ PFAS compounds via EPA Method 533/537.1 - Extended ($400+): Everything including radiologics
The PFAS test specifically uses EPA Method 533 or 537.1, which are the gold standard methods capable of detecting individual PFAS compounds down to single-digit parts per trillion.
NTL has operated since 1987 and offers similar EPA-certified panels. Their pricing tends to be slightly lower for comprehensive packages, but the interface is less polished. Results come via email PDF rather than an interactive dashboard.
Good option if you want the same lab accuracy at a modest discount and do not need the visual dashboard.
Home test strips ($10-$30 at hardware stores) use colorimetric reactions to indicate presence or absence of certain contaminants. They are useful for:
They cannot detect: - PFAS at any level - Heavy metals at low concentrations - VOCs or pesticides - Specific contaminant concentrations
Accuracy limitation: Strip tests show color changes that you compare against a printed chart. They indicate "present" or "not present" rather than precise concentrations. False negatives are common, especially for lead at levels between 5-15 ppb (which are still harmful but below the strip's detection threshold).
A TDS (Total Dissolved Solids) meter costs $15-$30 and gives an instant reading. Many people use these to "test water quality," but TDS measures dissolved minerals overall, not specific contaminants.
A TDS reading of 300 ppm might mean your water has healthy calcium and magnesium. Or it might mean lead and arsenic. The meter cannot distinguish. High TDS correlates loosely with hard water, not with contamination.
TDS meters are useful for one thing: verifying that your RO system is working. RO should reduce TDS by 90%+. If your tap reads 250 and your RO output reads 25, the membrane is functioning.
Use certified lab testing when: - You have never tested your water - You are on well water (no utility testing) - You are pregnant or have infants - You suspect PFAS contamination (near military base, industrial site, or airport) - Your water utility has issued advisories - You want to know exactly what filter to buy
Use DIY strips when: - You want a quick bacteria check after plumbing work - You need to verify chlorine levels for aquarium use - You want a rough hardness reading for soap/detergent decisions
Use a TDS meter when: - You want to verify your RO system is working - You want to track filter exhaustion (rising TDS = time to replace)
Check your water quality to understand your local utility's reported contaminants. This free check uses EPA compliance data to show what has been detected in your water system. If the results concern you, order a certified lab test to confirm with your specific tap's readings.
For most households, the SimpleLab Essential test ($50) plus the PFAS add-on ($250) provides the most actionable data. If cost is a barrier, start with the Essential panel and add PFAS testing later if your area has known contamination sources.