--- title: "How to Test Your Well Water (Step-by-Step, 2026 Guide) (2026)" description: "Free state labs, certified mail-in kits, and at-home strips: what to test for on a private well, how often, and how to read the report." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "Organization", "name": "Whole House Water Treatment", "url": "https://wholehousewatertreatment.com", "description": "Independent U.S. reviews of whole-house water filters, softeners and reverse osmosis systems, plus state and city water-quality guides." }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How do I test my well water at home?", "acceptedAnswer": { "@type": "Answer", "text": "If you own a private well, no one is testing your water for you. The EPA's drinking-water rules apply to public utilities, not the roughly 23 million U.S. households on private wells. Testing is on you, and the CDC recommends at least an annual check for coliform bacteria and nitrate plus a broader scan every 3 to 5 years. Step 1: decide what to test for. Every well should be checked for total coliform and E. coli (bacteria), nitrate and nitrite (septic and ag runoff), pH, hardness, iron, and total dissolved solids. Add arsenic if you are in the Western U.S., Maine, or the upper Midwest. Add PFAS if you are within a few miles of a military base, airport, chrome plater, or industrial site. Add radon and uranium in granite regions. Step 2: pick a testing route. There are three real options, and they answer different questions. Free state labs: most state health departments will test for coliform bacteria and nitrate for free or under $25 if you mail in a sample using their bottle. Search '[your state] private well testing' to find the program. Best for the annual safety check. Certified mail-in labs (Tap Score by SimpleLab, National Testing Labs, ETR): $150 to $700 depending on the panel. These run a full ICP-MS scan for 50 to 100+ contaminants including metals, VOCs, and (on premium tiers) PFAS. Best for the comprehensive 3 to 5 year baseline, before you buy a treatment system, or after any nearby industrial or agricultural change. At-home strip and drop kits: $10 to $40 at any hardware store. They give you fast directional reads on hardness, pH, iron, chlorine, and nitrate. Useful for sizing a softener or iron filter, but not a substitute for certified testing. Step 3: collect the sample correctly. For bacteria, run the cold tap for 5 minutes, then sterilize the spout with a flame or a 10% bleach wipe, then fill the sterile bottle without touching the inside. For metals, do NOT run the tap first: a first-draw sample catches anything leaching from your plumbing. Ship same-day with the cold pack the lab provides. Step 4: read the report. Each contaminant has an EPA Maximum Contaminant Level (the legal limit for utilities) and often an EWG health guideline (a stricter advisory). Anything above the EPA limit needs treatment now. Anything above the EWG guideline but below the EPA limit is your judgment call. Step 5: match results to a treatment. Bacteria or coliform present means a UV purifier and a chlorine shock of the well. Iron over 0.3 ppm or sulfur smell means an air-injection iron filter. Hardness over 7 gpg means a softener. PFAS or arsenic detected means an RO unit at the kitchen sink at minimum. Multiple problems usually need a stacked treatment train, sediment first then iron then softener then UV. Re-test 30 days after any new system goes in to confirm the numbers actually moved. Then put the annual coliform and nitrate test on your calendar." } }, { "@type": "Question", "name": "How often should I test my well water?", "acceptedAnswer": { "@type": "Answer", "text": "The CDC recommends testing for total coliform and nitrate every year, and a broader panel covering metals, VOCs, and (in at-risk areas) PFAS every 3 to 5 years. Re-test after any flood, nearby construction, or sudden change in taste or color." } }, { "@type": "Question", "name": "Can I trust at-home well water test strips?", "acceptedAnswer": { "@type": "Answer", "text": "Strip kits are fine for directional reads on hardness, pH, iron, and chlorine, which is useful when sizing a softener or iron filter. They are not a substitute for a certified lab on bacteria, nitrate, arsenic, or PFAS." } }, { "@type": "Question", "name": "How much does a certified well water test cost?", "acceptedAnswer": { "@type": "Answer", "text": "Most state health departments test for coliform and nitrate free or under $25. A full mail-in panel from Tap Score, National Testing Labs, or ETR runs $150 to $700 depending on whether PFAS, radon, and uranium are included." } }, { "@type": "Question", "name": "What do I do if my well water tests positive for bacteria?", "acceptedAnswer": { "@type": "Answer", "text": "Shock-chlorinate the well per state health guidelines, then install a UV purifier rated for Class A 30 mJ/cm². Re-test 30 days after treatment to confirm the coliform and E. coli results are clear." } } ] }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://wholehousewatertreatment.com/" }, { "@type": "ListItem", "position": 2, "name": "Learn", "item": "https://wholehousewatertreatment.com/learn" }, { "@type": "ListItem", "position": 3, "name": "How to Test Your Well Water (Step-by-Step, 2026 Guide)", "item": "https://wholehousewatertreatment.com/learn/how-to-test-well-water" } ] } ] --- [![Whole House Water Treatment logo](/assets/logo-Cd_iTZFZ.png)Whole House Water Treatment WHWT ](/) [Find Your System](/find-your-system)[Best Filters](/best-whole-house-water-filters)[Best Softeners](/best-water-softeners)[Well Water](/best-well-water-filtration-systems)[Water Quality](/water-quality)[Guides](/buying-guides)[Learn](/learn)[About](/about) 1. [Home](/) 2. [Learn](/learn) 3. How to Test Your Well Water (Step-by-Step, 2026 Guide) Learn · 6 min read # How to Test Your Well Water (Step-by-Step, 2026 Guide) If you own a private well, no one is testing your water for you. The EPA's drinking-water rules apply to public utilities, not the roughly 23 million U.S. households on private wells. Testing is on you, and the CDC recommends at least an annual check for coliform bacteria and nitrate plus a broader scan every 3 to 5 years. Step 1: decide what to test for. Every well should be checked for total coliform and E. coli (bacteria), nitrate and nitrite (septic and ag runoff), pH, hardness, iron, and total dissolved solids. Add arsenic if you are in the Western U.S., Maine, or the upper Midwest. Add PFAS if you are within a few miles of a military base, airport, chrome plater, or industrial site. Add radon and uranium in granite regions. Step 2: pick a testing route. There are three real options, and they answer different questions. Free state labs: most state health departments will test for coliform bacteria and nitrate for free or under $25 if you mail in a sample using their bottle. Search '\[your state\] private well testing' to find the program. Best for the annual safety check. Certified mail-in labs (Tap Score by SimpleLab, National Testing Labs, ETR): $150 to $700 depending on the panel. These run a full ICP-MS scan for 50 to 100+ contaminants including metals, VOCs, and (on premium tiers) PFAS. Best for the comprehensive 3 to 5 year baseline, before you buy a treatment system, or after any nearby industrial or agricultural change. At-home strip and drop kits: $10 to $40 at any hardware store. They give you fast directional reads on hardness, pH, iron, chlorine, and nitrate. Useful for sizing a softener or iron filter, but not a substitute for certified testing. Step 3: collect the sample correctly. For bacteria, run the cold tap for 5 minutes, then sterilize the spout with a flame or a 10% bleach wipe, then fill the sterile bottle without touching the inside. For metals, do NOT run the tap first: a first-draw sample catches anything leaching from your plumbing. Ship same-day with the cold pack the lab provides. Step 4: read the report. Each contaminant has an EPA Maximum Contaminant Level (the legal limit for utilities) and often an EWG health guideline (a stricter advisory). Anything above the EPA limit needs treatment now. Anything above the EWG guideline but below the EPA limit is your judgment call. Step 5: match results to a treatment. Bacteria or coliform present means a UV purifier and a chlorine shock of the well. Iron over 0.3 ppm or sulfur smell means an air-injection iron filter. Hardness over 7 gpg means a softener. PFAS or arsenic detected means an RO unit at the kitchen sink at minimum. Multiple problems usually need a stacked treatment train, sediment first then iron then softener then UV. Re-test 30 days after any new system goes in to confirm the numbers actually moved. Then put the annual coliform and nitrate test on your calendar. ## Recommended products that solve this If this is your situation, these are the systems we recommend. Buttons open the brand's current pricing in a new tab. Top pick SpringWell ### SpringWell WS Well Water Filter Well water (air injection) [![SpringWell WS standalone air-injection well water iron filter](https://www.springwellwater.com/wp-content/uploads/2025/03/WS1.png)](https://www.springwellwater.com/product/well-water/whole-house-iron-filter/) Image: [SpringWell product page →](https://www.springwellwater.com/product/well-water/whole-house-iron-filter/) Air-injection iron, sulfur, and manganese filter for the most common well complaints once your test confirms iron over 0.3 ppm. [Check latest price on SpringWell](https://www.springwellwater.com/product/well-water/whole-house-iron-filter/)[Read full review →](/reviews/springwell-well-water) Also consider SpringWell ### SpringWell UV Water Purification UV disinfection [![SpringWell UV ultraviolet water purification system](https://www.springwellwater.com/wp-content/uploads/2021/11/UV-knockout.png)](https://www.springwellwater.com/product/uv-systems/uv-water-purification-system/) Image: [SpringWell product page →](https://www.springwellwater.com/product/uv-systems/uv-water-purification-system/) Class A 30 mJ/cm² UV purifier, the standard response to any coliform or E. coli positive on a private well. [Check latest price on SpringWell](https://www.springwellwater.com/product/uv-systems/uv-water-purification-system/)[Read full review →](/reviews/springwell-uv) Specialist add-on Aquasana ### Aquasana OptimH2O RO (under-sink) Point-of-use reverse osmosis Certified point-of-use RO for the kitchen tap when your panel flags PFAS, arsenic, or nitrate above the EWG guideline. [Check latest price on Aquasana](https://www.aquasana.com/reverse-osmosis/under-sink-water-filter-systems.html)[Read full review →](/reviews/aquasana-optimh2o-ro) ## Frequently asked questions How often should I test my well water? The CDC recommends testing for total coliform and nitrate every year, and a broader panel covering metals, VOCs, and (in at-risk areas) PFAS every 3 to 5 years. Re-test after any flood, nearby construction, or sudden change in taste or color. Can I trust at-home well water test strips? Strip kits are fine for directional reads on hardness, pH, iron, and chlorine, which is useful when sizing a softener or iron filter. They are not a substitute for a certified lab on bacteria, nitrate, arsenic, or PFAS. How much does a certified well water test cost? Most state health departments test for coliform and nitrate free or under $25. A full mail-in panel from Tap Score, National Testing Labs, or ETR runs $150 to $700 depending on whether PFAS, radon, and uranium are included. What do I do if my well water tests positive for bacteria? Shock-chlorinate the well per state health guidelines, then install a UV purifier rated for Class A 30 mJ/cm². Re-test 30 days after treatment to confirm the coliform and E. coli results are clear. ## Keep reading - [Best well water filtration systems →](/best-well-water-filtration-systems) - [Water testing at home vs certified lab →](/buying-guides/water-testing-at-home-vs-certified-lab) - [Iron filters for well water →](/buying-guides/iron-filters-for-well-water) - [UV purifiers for well water →](/buying-guides/uv-purifiers-for-well-water) - [Find your system →](/find-your-system) ## More explainers - [ Is Chloramine Safe to Drink? 4 min read ](/learn/is-chloramine-safe-to-drink) - [ How Often Should You Replace a Whole-House Water Filter? 4 min read ](/learn/how-often-replace-whole-house-filter) - [ Do I Need a Water Softener? 4 min read ](/learn/do-i-need-a-water-softener) - [ What Are PFAS in Drinking Water, and Should You Worry? 5 min read ](/learn/what-is-pfas-in-drinking-water) Whole House Water Treatment Independent, U.S.-focused reviews and water-quality guides for whole-house filters, softeners and reverse osmosis systems. Informational only - not medical or safety advice. Reviews - [Find Your System (tool)](/find-your-system) - [Best whole house filters](/best-whole-house-water-filters) - [Best water softeners](/best-water-softeners) - [Best well water systems](/best-well-water-filtration-systems) - [Water quality by state](/water-quality) - [Buying guides](/buying-guides) Site - [About](/about) - [Affiliate disclosure](/affiliate-disclosure) - [Privacy policy](/privacy-policy) - [Terms](/terms) © 2026 Whole House Water Treatment. As an independent marketing partner of SpringWell, Aquasana, SoftPro and Pelican, we may earn commissions from qualifying purchases. Prices, specifications and certifications are subject to change - always verify on the manufacturer's site before purchasing.