This guide walks you through seven days of practical, incremental steps to understand and improve your household water quality. Each day requires 15 to 30 minutes. By the end of the week, you will know exactly what is in your water and have a plan to address it.
You do not need to be a water expert. You do not need to spend thousands of dollars. You just need to follow the steps.
Time needed: 15 minutes
Your water utility publishes a Consumer Confidence Report (CCR) every year. This is your starting point.
What to do: 1. Search online for "[your city or utility name] water quality report" or "consumer confidence report." 2. Download the most recent report (it should cover the previous calendar year). 3. Look at the detected contaminants table. Note any contaminants that are close to or above their MCL (Maximum Contaminant Level). 4. Specifically look for: PFAS compounds (PFOA, PFOS), lead, disinfection byproducts (TTHMs, HAA5), and nitrates.
If you are on a private well, skip to Day 2. Wells are not covered by CCRs.
Check your water quality to see contamination data for your zip code alongside your utility's official report.
Time needed: 20 minutes
Now that you have your report (or know you are on a well), identify the risks most relevant to your household.
What to do: 1. Age of your home: Homes built before 1986 may have lead pipes or lead solder. Homes built before 1978 may have lead paint that can contaminate soil and well water. 2. Proximity to contamination sources: Check whether you live near a military base (AFFF firefighting foam = PFAS), industrial facility, landfill, or agricultural operation. 3. Your household members: Infants, pregnant women, elderly individuals, and immunocompromised people are at higher risk from water contaminants. 4. Your water source type: Municipal surface water, municipal groundwater, or private well. Each has different risk profiles.
Write down your top 2 to 3 concerns. These will guide your testing and filter choices.
Time needed: 15 minutes
Even if your utility report looks clean, testing your tap directly gives you the most accurate picture.
What to do: 1. If your main concern is PFAS: Order a PFAS lab test panel. SimpleLab (Tap Score) offers residential PFAS testing starting around $250. Turnaround is about 2 weeks. 2. If your main concern is lead: Order a lead test kit. These are cheaper ($20 to $50 for a certified lab mail-in kit). Some utilities and local health departments offer free lead testing. 3. If you want a broad picture: Order a comprehensive water test panel that covers metals, minerals, PFAS, bacteria, and VOCs. Expect to pay $200 to $500. 4. If you are on a private well: Test annually for bacteria (coliform, E. coli), nitrates, and pH at minimum. Add PFAS and metals testing based on your Day 2 risk assessment.
While you wait for the kit to arrive, move on to Days 4 and 5.
Time needed: 15 minutes
While you wait for test results, these no-cost steps reduce your exposure to the most common contaminants.
What to do: 1. Flush your pipes each morning. Run your cold water tap for 1 to 2 minutes before using it for drinking or cooking. This clears water that has been sitting in contact with pipes overnight, reducing lead exposure. 2. Use cold water for cooking and drinking. Hot water dissolves more lead from pipes and fixtures than cold water. Never use hot tap water for baby formula, coffee, or cooking. 3. Clean your faucet aerators. Unscrew the aerator screen on your faucets and rinse out any sediment or debris. Buildup here can harbor lead particles and bacteria. 4. Check your refrigerator filter. If you use a refrigerator water dispenser, check when the filter was last replaced. Most need replacement every 6 months.
These steps cost nothing and reduce exposure immediately.
Time needed: 30 minutes
Today, research which filter type makes sense for your household, budget, and living situation.
What to do: 1. Determine your budget: Pitcher filters ($30 to $80), faucet mounts ($25 to $50), under-sink systems ($150 to $500), whole-house systems ($1,000+). 2. Check for NSF certifications: - NSF P473 for PFAS removal - NSF 53 for lead and VOC removal - NSF 42 for taste and chlorine 3. Verify certifications independently at nsf.org or wqa.org. Do not rely solely on the product packaging. 4. Consider your living situation: - Renting? Pitcher or faucet-mount filters require no installation and can move with you. - Own your home? Under-sink reverse osmosis offers the best PFAS removal. - On a well with confirmed contamination? Consider whole-house treatment.
Make a shortlist of 2 to 3 filters that fit your needs.
Time needed: 20 minutes
Your test kit should have arrived by now. Today, collect your sample and order your chosen filter.
What to do: 1. Collect your water sample following the lab's instructions exactly. Key points: - Use only the provided container - Run cold water for 2 minutes before collecting - Do not touch the inside of the bottle or cap - Label with date, time, and tap location - Ship within 24 hours using the provided packaging 2. Order your filter. Choose from your Day 5 shortlist. If buying online, check that the specific model number (not just the brand) carries NSF P473 or NSF 53 certification. 3. Order replacement filters at the same time so you have them on hand. Set a calendar reminder for the replacement date (typically 6 to 12 months for carbon filters, 2 to 3 years for RO membranes).
Time needed: 30 minutes (varies by filter type)
What to do: 1. Install the filter following the manufacturer's instructions. - Pitchers: Fill and discard the first 1 to 2 batches to flush carbon dust. - Faucet mounts: Attach to your faucet, run water for 5 minutes to prime. - Under-sink RO: Follow installation guide or hire a plumber ($100 to $200 for installation). 2. Taste test. Compare filtered water to unfiltered. Most people notice an immediate improvement in taste and odor. 3. Set up monitoring: - Calendar reminder for filter replacement - Calendar reminder to re-test your water in 12 months - Bookmark KnowYourExposure.com to check for updates to your area's water data 4. When your lab results arrive (in 1 to 2 weeks), compare them to the EPA MCLs: 4 ppt for PFOA, 4 ppt for PFOS, hazard index of 1.0 for the mixture group. If results are above these thresholds and you are on public water, contact your utility.
Check your water quality to stay updated on contamination data for your area.
Check your water now. Enter your zip code at KnowYourExposure.com to see what contaminants have been detected in your local water supply, including PFAS, lead, and other regulated compounds.