The Bottom Line
Tap Score by SimpleLab is the most comprehensive home water testing kit available. You collect a sample from your tap, mail it to an EPA-certified laboratory, and get back a detailed report that tells you exactly what's in your water, whether those levels are safe, and what type of filtration system would fix any problems. It's not cheap at $150 for the Essential kit, but it's the single smartest investment you can make before spending $90 to $500 on a water filter you may not even need - or worse, one that doesn't address your actual contaminants.
What Is It
Tap Score is a mail-in water test kit made by SimpleLab, a water diagnostics company based in Berkeley, California. Unlike test strips you dip in a glass and squint at, Tap Score sends your water sample to an EPA-certified, ISO-accredited laboratory where it's analyzed using the same methods the EPA uses to regulate public water systems.
Depending on which kit you choose, your sample gets tested for anywhere from 50 to 200+ contaminants. You receive a detailed digital report that includes:
- Exact contaminant concentrations (parts per billion, not vague color-coded ranges)
- Health-based risk assessments for every detected contaminant
- Comparison against EPA Maximum Contaminant Levels (MCLs) and health guidelines
- Specific filtration recommendations based on your results
- An interactive online dashboard to explore your data
This is not a DIY test. This is laboratory-grade analysis delivered in a format that regular people can actually understand.
Why Test Your Water
Here's what most parents don't realize: the EPA only regulates 90 contaminants in drinking water. There are thousands of known contaminants. Many dangerous substances - including most PFAS chemicals, microplastics, and pharmaceutical residues - have no federal limits at all. They could be in your water right now and your city's annual report wouldn't mention them.
Even for regulated contaminants, your city's Consumer Confidence Report (CCR) shows system-wide averages. It doesn't reflect what's happening at your specific tap. Old pipes in your building, corroding service lines on your street, or seasonal changes at the treatment plant can all push contaminant levels higher than the citywide average suggests.
We built a free Water Quality Lookup tool that pulls your utility's public violation data - and we recommend starting there. But that data has limits. Tap Score tests what's actually coming out of your faucet, right now, at the exact location where your family drinks water.
Knowledge is power. Once you know what's in your water, you can choose the right filter instead of guessing - or discover you don't need one at all.
What It Tests
The specific contaminants depend on which kit tier you choose, but across all tiers, Tap Score covers the contaminants that matter most for families:
- PFAS/PFOA/PFOS (forever chemicals - tested in Advanced and Extended kits)
- Lead (especially critical for homes built before 1986)
- Bacteria & coliforms (E. coli, total coliforms)
- Pesticides & herbicides (atrazine, glyphosate, chlordane)
- Nitrates & nitrites (especially important for infants)
- Arsenic (naturally occurring in many groundwater sources)
- Copper (leaches from household plumbing)
- Chlorine & chloramine (disinfection byproducts)
- Hardness, pH, TDS (general water quality indicators)
- Volatile organic compounds (industrial solvents, fuel additives)
- Radiological contaminants (uranium, radium - Extended kit)
The Essential kit covers the most common and dangerous contaminants for city water. The Advanced and Extended kits add PFAS testing, radiological screening, and a wider panel of industrial chemicals. For well water, SimpleLab offers a dedicated Well Water kit that targets the contaminants most likely to affect private wells.
How It Works
The process is simple enough that we did it on a Tuesday morning before the kids woke up:
- Order your kit - Choose your tier based on what you want tested. The kit arrives in 2-3 days with everything you need: collection vials, instructions, and a prepaid return shipping label.
- Collect your sample - Follow the included instructions (run your tap for a specific time, fill the vials in order, cap them). Takes about 10 minutes. Some tests require a "first draw" sample from water sitting in your pipes overnight.
- Mail it back - Drop the prepaid package at any USPS or UPS location. SimpleLab recommends shipping Monday through Wednesday so the sample doesn't sit in a warehouse over a weekend.
- Wait for results - The lab analyzes your sample in 5 to 10 business days. You get an email when the report is ready.
- Read your report - Log in to your Tap Score dashboard to see exact contaminant levels, health risk assessments, and filtration recommendations. The report is color-coded (green/yellow/red) so you can spot problems instantly.
Kit Tiers
SimpleLab offers several kit options. Here are the three main tiers for city water:
| Kit | Price | Contaminants Tested |
|---|---|---|
| Essential | ~$150 | 50+ (metals, bacteria, physical properties, common chemicals) |
| Advanced | ~$250 | 111+ (adds PFAS, pesticides, VOCs, disinfection byproducts) |
| Extended | ~$350 | 200+ (adds radiological, full industrial chemical panel) |
| Well Water | ~$200 | 54+ (tailored for private well contaminants) |
Our recommendation: If you're on city water and your main concern is PFAS, go with the Advanced kit. It's the sweet spot - you get the PFAS panel plus all the common contaminants. If you're on city water and just want a general health check, the Essential kit covers the most important bases. If you're on well water, get the Well Water kit - it tests for the specific contaminants (bacteria, nitrates, arsenic) that private wells are most vulnerable to.
Cost Analysis
At $150 to $350, Tap Score is more expensive than test strips. But consider what you're actually paying for:
| Option | Cost | What You Get |
|---|---|---|
| Test strips (Varify, etc.) | $20-30 | Rough yes/no for 10-16 contaminants. No PFAS. High error rate. |
| Tap Score Essential | ~$150 | EPA-certified lab analysis of 50+ contaminants. Exact concentrations. Health report. |
| Tap Score Advanced | ~$250 | 111+ contaminants including PFAS. The most common recommendation for families. |
| Private lab test (direct) | $300-500+ | Same lab quality, but you arrange shipping and interpret raw data yourself. |
| Wrong water filter | $90-500 | Money wasted on a filter that doesn't address your actual contaminants. |
The real cost analysis isn't Tap Score vs. test strips. It's Tap Score vs. buying the wrong filter. If you spend $475 on a reverse osmosis system when your water only has a chlorine taste issue, you overspent by $400. If you spend $30 on a Brita when your water has lead, you underspent in a way that affects your family's health. Tap Score tells you exactly what you need so you spend the right amount on the right solution.
What We Like
- EPA-certified, ISO-accredited lab - not a DIY color-chart test
- Tests for 50-200+ contaminants depending on kit tier
- Exact concentrations in parts per billion, not vague ranges
- Health-based risk assessment for every detected contaminant
- Specific filtration recommendations based on your actual results
- Interactive online dashboard - easy to understand, color-coded
- Dedicated well water kit for private well owners
- Prepaid return shipping included
- SimpleLab has tested 1,000,000+ water samples
What Could Be Better
- $150-350 is a real investment, though it's a one-time cost that can save hundreds on filter choices
- Results take 5-10 business days (not instant like test strips)
- PFAS testing requires the Advanced kit ($250) - not included in the Essential
- Sample collection has specific timing requirements (first draw for lead, etc.)
- One-time snapshot - water quality can change seasonally, so annual retesting is ideal
How It Compares
We've looked at every major home water testing option. Here's how Tap Score stacks up.
Tap Score vs Varify Test Strips
Varify strips ($25) test for 16 parameters and give you color-coded results in minutes. They're fine for a quick gut check, but they can't measure exact concentrations, can't detect PFAS, and have meaningful false-positive and false-negative rates. If the strips show a problem, you still need a lab test to confirm. If they show nothing, you might have contaminants they simply can't detect. Tap Score costs more but gives you lab-verified data you can actually act on.
Tap Score vs Safe Home Water Test
Safe Home offers EPA-certified lab testing similar to Tap Score, with kits in the $150-250 range. Both are legitimate options. Tap Score edges ahead on the reporting side - the interactive dashboard, health risk scoring, and filtration recommendations are more detailed and easier to navigate. Safe Home is a solid alternative if Tap Score is out of stock or you find a better price.
Tap Score vs SimpleWater
SimpleWater (now part of the SimpleLab family) was an earlier iteration of the same concept. If you see both brands, they're related. Tap Score is the current, more polished version with better reporting and wider kit options. Go with Tap Score.
Tap Score vs Free City Water Reports
Your city's annual Consumer Confidence Report is free and worth reading (check yours with our Water Quality Lookup tool). But it shows system-wide averages, not your specific tap. It also doesn't test for many unregulated contaminants like PFAS. Tap Score tests your actual water at your actual faucet. Both are useful - start with the free report, then get Tap Score if you want the full picture.
Who Should Buy It
Get Tap Score if...
- You have children at home - knowing exactly what's in your water is step one for protecting developing brains and bodies
- You're on well water - private wells aren't regulated by the EPA, so nobody is testing your water but you
- Your home was built before 1986 - older plumbing may contain lead solder or lead service lines
- You're about to buy a water filter - test first so you know which filter actually addresses your contaminants
- Your city has had water quality violations (check at thoughtfulmom.com/tools/water-quality)
- You're pregnant or have an infant - nitrates, lead, and bacteria are especially dangerous for babies
Skip Tap Score if...
- You've already tested recently and your results were clean - annual retesting is ideal but not urgent
- You just want to improve taste - a basic carbon filter or Brita handles that without testing
- Budget is extremely tight right now - start with our free Water Quality Lookup tool to check your utility's public data first
Our Verdict: 9.3 out of 10
Tap Score is the test we recommend to every family before buying a water filter. It's the difference between guessing and knowing. We used it ourselves, and the results changed what filter we bought - the contaminants we were worried about weren't actually in our water, but a contaminant we'd never heard of was elevated. Without the test, we would have spent money solving the wrong problem.
At $150 for the Essential kit, it's less than the cost of most quality water filters. And the information it gives you makes every dollar you spend on filtration smarter. Start with our free Water Quality Lookup tool to see your utility's public data, then order Tap Score to find out what's actually coming out of your tap.
$150 to know exactly what your family is drinking. That's not an expense - it's the smartest first step.
Free return shipping included. Results in 5-10 business days.
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Frequently Asked Questions
Yes, especially if you have kids, are on well water, or live in an older home. The Essential kit ($150) tests for 50+ contaminants at an EPA-certified lab and gives you a health-based report that tells you exactly what filtration system you need. That information alone can save you hundreds of dollars on the wrong filter. You can check your water utility's public data for free with our Water Quality Lookup tool first - but Tap Score tests your actual tap water, which is different from the city-wide average.
Results typically arrive in 5 to 10 business days after SimpleLab receives your sample. You'll get an email notification when your report is ready, and you can view it online through their interactive dashboard. PFAS testing may take slightly longer due to the specialized analysis required.
Test strips (like Varify) cost $20-30 and give you a rough yes/no for a handful of contaminants. They can't measure exact concentrations, can't detect PFAS at all, and have high false-positive and false-negative rates. Tap Score sends your sample to an EPA-certified lab that uses the same equipment and methods the EPA uses. You get exact concentrations measured in parts per billion, health risk assessments, and specific filtration recommendations. It's the difference between a home pregnancy test and a blood panel.
Yes, for two reasons. First, your city's water quality report (CCR) shows averages across the entire system - not what's coming out of your specific tap. Old pipes in your home or neighborhood can add lead, copper, and other metals after the water leaves the treatment plant. Second, many contaminants like PFAS aren't yet regulated by the EPA, so they won't appear on your city's report even if they're present. Tap Score tests your actual water at your actual tap.