How to Choose a Well Water Test Panel

Choose a well water test panel by writing down the questions it needs to answer. Routine testing, establishing a baseline for an unfamiliar well, and investigating a possible spill call for different test lists. Start with the annual basics, add locally relevant contaminants, and check the actual panel contents before paying.

If you know or suspect harmful contamination, use bottled water or another safe source for drinking, cooking, and food preparation while getting health department advice. Do this before arranging tests. Boiling can kill germs but does not remove chemicals. For a flooded well, do not drink or wash with the water; suspected fuel contamination also calls for avoiding use pending specific guidance. A nitrate or arsenic concern requires safe water for drinking, cooking, and food preparation and contaminant-specific advice about other uses, rather than automatically applying flood precautions. CDC treatment guidance and EPA well protection guidance

Choose among three testing needs

Annual basics

CDC and EPA recommend testing private well water at least annually for total coliform bacteria, nitrate, pH, and total dissolved solids (TDS). Check for all four: a package labeled “bacteria and nitrate” may leave out pH and TDS. Ask your health department which additional contaminants belong in your local testing plan. CDC testing guidance

Total coliform is an indicator of possible contamination. E. coli testing can help identify evidence of fecal contamination; ask whether it is included or requires a separate order. pH helps assess acidity and potential plumbing effects, while TDS measures dissolved material. Neither pH nor TDS identifies every harmful substance. CDC testing guidance

Baseline with local additions

If you have no useful previous results, a broader panel can establish a starting record. Keep the annual basics and select additions using local groundwater advice, nearby land uses, plumbing, and treatment questions. A fixed broad package is useful only if it includes those additions.

For ongoing scheduling and the broader household routine, see our well water check guide.

Targeted investigation

A changed smell, nearby contamination notice, flood, or well repair calls for testing that addresses the event. Describe what happened to the health department before choosing a package. A large panel can still omit the chemical or germ under investigation. CDC recommends identifying potential problems before buying additional tests. CDC testing guidance

Match additional tests to your property

Use this table to prepare a request for the lab. The entries are tests to discuss, not automatic purchases for every home.

Property condition or concern	Tests to discuss
Local groundwater concerns	Specifically recommended chemicals, such as arsenic, mercury, radium, or pesticides
Intensive agriculture nearby	Nitrate, nitrite, coliform bacteria, and locally relevant pesticides
Plumbing containing lead or signs of corrosion	Lead, copper, pH, and corrosion assessment
Landfill, factory, gas station, or dry cleaner nearby	Relevant volatile organic compounds (VOCs), metals, TDS, pH, sulfate, and chloride
Salty taste near the coast or a heavily salted road	Chloride, sodium, and TDS
Stained fixtures or laundry	Iron, copper, and manganese
Scale or poor soap lather	Hardness
Objectionable odor	Hydrogen sulfide, metals, and corrosion assessment; describe the odor before ordering

These selections follow EPA’s condition-based testing guidance and CDC’s recommendations for local additions. For a specific local concern, our arsenic water testing guide explains how to focus that investigation.

Compare a certified local lab with a mail-in kit

A local laboratory is worth checking first for a narrow annual panel, a targeted investigation, or a transaction with sampling requirements. Ask whether your health department offers testing; EPA notes that some departments may provide private well testing free. Get an itemized quote covering your full test list, collection materials, and delivery arrangements. EPA well testing guidance

A mail-in kit can simplify ordering a broader package and obtaining collection materials. Its value depends on the included tests, sample delivery requirements, and suitability of the performing laboratory.

For either route, verify the laboratory’s current drinking-water certification with the relevant state program. Ask whether its certification covers your requested analytes and methods. For a home sale, also confirm the required panel, collector, documentation, and accepted laboratory with the party requiring the results. A general accreditation claim does not establish suitability for every purpose. Start with EPA’s state certification directory or our official state resources.

Tap Score’s three well-water panels

As of September 6, 2026, Tap Score’s official Essential product page listed the following offers in its three-kit comparison. These are that provider’s package prices, not national testing-cost estimates. Official product page and comparison

Panel	Listed price	Listed parameter count	Coverage shown	Included shipping label; business days at lab
Essential	$209	54	Annual basics, E. coli, metals including arsenic and lead, minerals, hardness, and a hydrogen-sulfide self-test	Standard; 5 days
Advanced	$399	114	Broader coverage including listed VOCs/SVOCs, petroleum compounds, and pesticides	Overnight; 5 days
Extended	$1,125	142	Listed PFAS and radiological coverage, alongside other chemical categories	Overnight; 12 days

The counts are not counts of independent laboratory analytes. Essential’s 54 entries include eight calculated parameters and one hydrogen-sulfide self-test. Treat all three headline counts as package totals, and compare the substances you need by name.

Essential includes the four annual basics, but it also buys broader chemistry testing. Compare it with a local quote if those basics are your only need. Advanced may fit an investigation involving its listed organic chemicals. Extended lists 25 PFAS entries and two radiological entries, which matter only if they match your question.

Do not assume each larger package contains every smaller-package test: the comparison lists two pesticides for Advanced and one for Extended. Ask for the complete current analyte lists, methods, and reporting limits before selecting either. Tap Score describes its network laboratories as certified, but you should confirm the assigned laboratory’s suitability for your state and purpose. Tap Score package details

Shipping and turnaround are separate

For Essential’s included standard shipping, Tap Score says orders typically ship within 12–36 hours, arrive 2–3 business days after shipment, and include two-day FedEx return shipping to the lab. Its five-business-day lab estimate is additional to those transit stages.

Essential also lists standard outbound/overnight return and overnight-both-ways options. For overnight both ways, it says orders typically ship the same day and arrive within one business day of shipment. Check checkout pricing for upgrades.

The comparison labels Advanced and Extended shipping “Overnight” without specifying direction there. Confirm the outbound and return arrangements before ordering. Follow the kit’s collection instructions and confirm the permitted collection-to-analysis window, collection day, and lab receiving schedule before filling bottles. Tap Score shipping and turnaround details

Check what the report can establish

A report covers the requested analytes in the submitted sample. A panel with no flagged results does not establish that untested contaminants are absent.

Check the contaminant names, units, reporting limits, and comparison values. EPA public-system maximum contaminant levels are useful benchmarks for private wells, not federal private-well requirements. Ask your health department to interpret concerning results and guide any confirmation testing. If treatment is needed, select it for the identified contaminant and retest afterward before resuming affected uses. EPA testing and results guidance and CDC treatment guidance