A home water test can cost under a dollar or several hundred, and the cheap and expensive versions are not measuring the same thing. Strips give a rough colour for a few basic properties; a mail-in laboratory gives actual numbers, at laboratory detection limits, for the contaminants strips cannot see. Which job you have — curiosity, or a decision — decides what to spend.
We have not hands-on tested the kits or labs named here, and we have not tested your water. What we have done is check what each method can and cannot measure against EPA guidance, and check prices on the laboratories’ own stores. Background: the water quality hub.
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Start free: your Consumer Confidence Report
If a utility supplies your water, it already tests it and publishes the results in an annual Consumer Confidence Report, delivered by July 1 and covering the previous year. It is free, uses certified laboratory methods, and for anything from the source or treatment plant it is better data than any home kit. Read it first — our guide to how to read your water quality report takes ten minutes, and our what’s in my water tool tells you which system serves you.
What the report cannot describe is your house: lead or copper picked up from your own service line, solder and fixtures. That gap — your tap, not the system — is the legitimate reason to test at home. Well owners have the opposite situation: no report arrives, so home testing is the whole monitoring programme. See the Michigan well water guide.
What test strips can tell you — roughly
Dip strips are reagent pads on a plastic stick: you dip, wait, and match the colour against a printed chart. Used honestly, they screen for properties that sit at relatively high concentrations and change in broad bands:
- Free and total chlorine — enough to confirm disinfectant is present, roughly how much.
- Hardness and alkalinity — broad ranges; a first indication before sizing a softener, not the sizing number.
- pH — an approximate band.
- Nitrate — a coarse indication only, in wide steps.
The limits are structural, not a matter of buying a better brand. Colour matching by eye resolves wide steps, not precise values, and results shift with lighting and timing. A strip can tell you your water is hard; it cannot responsibly tell you whether hardness is 180 or 240 mg/L, the difference a softener setting turns on. Treat every result as a range with an error bar at least one colour block wide.
What strips cannot tell you: lead, PFAS, arsenic, bacteria
The contaminants people most often buy strips hoping to find are the ones strips are worst at. Lead matters in parts per billion — the action level is 15 ppb, and the health goal is zero. In a Virginia Tech study of 16 at-home lead kits, most were not suitable for drinking water, with detection limits in the milligrams-per-litre range — hundreds of times above the level that matters. A strip showing “no lead” has usually shown only that lead is below a far higher threshold.
The same scale problem applies to PFAS, measured in parts per trillion, and to arsenic at its 10 ppb limit: no colour-change chemistry resolves those concentrations. Home bacteria kits — a bottle you incubate — return presence or absence of coliform bacteria, not a count, and not under certified conditions; a positive needs laboratory confirmation. Handheld TDS pens measure conductivity converted to a dissolved-solids estimate. They say nothing about which solids, and nothing about lead, bacteria or PFAS.
Mail-in laboratory tests: what the money buys
A mail-in test reverses the process: the laboratory sends bottles and instructions, you fill and return them, and the lab runs the same style of methods utilities use, reporting a number and a detection limit for each analyte. EPA advice points the same way — it directs homeowners to laboratories certified for drinking water testing, and for private wells it is explicit: only use laboratories certified to do drinking water testing. For a single lead test, the EPA puts typical cost at $20 to $100.
Three mail-in options, priced from their own stores in November 2026:
- SimpleLab Tap Score (mytapscore.com) — Essential City, $189 for 49 analytes; Advanced City, $299 for 111 analytes; Advanced City + PFAS, $399 for 129 analytes including 18 PFAS. A standalone PFAS panel is listed at $335.
- National Testing Laboratories WaterCheck (watercheck.com) — WaterCheck Lite, $169 for 34 items; WaterCheck Deluxe, $310 for 107 items. Return shipping of your sample is not included in either price.
- Ward Laboratories (wardlab.com) — a narrower, cheaper route: its published price list puts the W-5 Household Mineral Test at $30 for minerals, hardness, nitrate, pH and related basics. That panel answers softener and mineral questions; it is not a lead, PFAS or bacteria panel.
Collection matters as much as the panel. For lead, laboratories use a first-draw sample: water that has sat unused for at least six hours, collected before any flushing. Follow the kit’s instructions exactly — a flushed sample can read low and reassure you wrongly.
Costs compared, with totals
| Method | Typical cost | What the total really buys |
|---|---|---|
| Consumer Confidence Report (city water) | $0 | Certified system-level results; nothing about your plumbing |
| Dip strips, multiparameter pack | Around $10–$30 per pack | Dozens of rough readings for chlorine, hardness, pH, alkalinity; no decision-grade lead, PFAS or bacteria result |
| Ward Laboratories W-5 mineral panel | $30, plus getting your sample to the lab | Accurate minerals and hardness — softener-sizing numbers strips approximate |
| Single-analyte certified lab test (e.g. lead) | $20–$100 (EPA’s range) | One contaminant, measured properly |
| NTL WaterCheck Lite | $169, plus return shipping | 34 items including heavy metals, certified laboratory |
| Tap Score Essential City | $189 | 49 analytes; general city-water baseline including metals |
| Tap Score Advanced City + PFAS | $399 | 129 analytes including 18 PFAS — broad pre-purchase panel |
The worked math: a $20 strip pack used to decide a $600 filter purchase is the expensive option if it aims you at the wrong contaminant — or at none. One $189 panel before buying treatment is cheaper than one wrong system, and it doubles as the before picture you later test against. Conversely, if nothing raises a specific question, the honest total is $0: strips for curiosity, and no lab bill at all.
When a lab test is worth it
- Lead is the question. Older home, possible lead service line, pre-1986 solder, or young children in the house. Only a lab resolves parts per billion.
- You are on a private well. The EPA baseline is annual testing for total coliform bacteria, nitrate, total dissolved solids and pH, through a certified laboratory — plus arsenic at least once, and after flooding, repairs, or any change in taste, colour or smell.
- PFAS or arsenic is a local concern. Both need laboratory methods; choose a panel that names them, in writing, before you pay.
- Before buying a big system. A system specified against a real panel beats one bought against a strip chart — and the same panel, rerun after installation, verifies it.
- A result will change what you do. If no possible result would change a decision, the test is entertainment; price it at strip prices.
Frequently asked questions
Are home test strips accurate enough for lead?
No. Lead is decided at parts per billion and the health goal is zero; most at-home kits studied could not detect lead anywhere near that level. For lead, use a certified laboratory and a first-draw sample.
Do I need a lab test if my city report looks clean?
Usually not for what the report covers. The remaining reason is your own plumbing — lead and copper added inside your house — which no system report can see. If that is not plausible for your home’s age and materials, the report plus strips is a reasonable stopping point.
How often should well owners test?
At least annually for total coliform bacteria, nitrate, total dissolved solids and pH, per EPA guidance, using a certified laboratory — and after flooding, well work, or a change in the water. See our Michigan well water guide.
Which single test should I buy first?
The one matched to your question. Lead: a single-analyte lab test, $20–$100. General baseline or pre-purchase check: a broad mail-in panel, $189–$399 above. Hardness only: a $30 mineral panel. Start from your system’s data with our what’s in my water tool.
The bottom line
Strips screen; laboratories decide. Read the free report first, use strips only for the broad properties they can honestly show, and send a sample to a certified lab whenever the answer involves lead, arsenic, PFAS, bacteria, a well, or a purchase bigger than the test.