https://zipcheckup.com/guides/ In-depth guides on water quality, contaminants, and home safety. en-us Wed, 03 Jun 2026 21:03:11 GMT https://zipcheckup.com/guides/best-carbon-monoxide-detectors/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-carbon-monoxide-detectors/ Why CO Detection Matters {#why-co-detection-matters} Carbon monoxide is produced whenever fuel — natural gas, propane, oil, wood, coal, or gasoline — burns incompletely. The gas is invisible and has... https://zipcheckup.com/guides/best-countertop-water-filters/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-countertop-water-filters/ Why Choose a Countertop Filter? {#why-countertop} Not every household can install an under-sink reverse osmosis system. Rental lease agreements often prohibit plumbing modifications. RVs, tiny homes,... https://zipcheckup.com/guides/best-earthquake-kits/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-earthquake-kits/ Why Have an Earthquake Kit {#why-earthquake-kit} Earthquakes strike without warning. Unlike hurricanes or floods, there is no evacuation window, no weather forecast, no countdown. When a major quake... https://zipcheckup.com/guides/best-fluoride-water-filters/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-fluoride-water-filters/ Fluoride in US Drinking Water {#fluoride-in-us-water} Fluoride is a naturally occurring mineral found in soil, rocks, and water throughout the United States. It enters drinking water through two... https://zipcheckup.com/guides/best-heat-pump-water-heaters/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-heat-pump-water-heaters/ Why Heat Pump Water Heaters {#why-hpwh} Water heating accounts for roughly 18% of a typical home's energy use — second only to space conditioning. For most households running a conventional electric... https://zipcheckup.com/guides/best-hepa-air-purifiers-wildfire-smoke/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-hepa-air-purifiers-wildfire-smoke/ Why Wildfire Smoke Needs HEPA {#why-wildfire-smoke} Wildfire smoke is not ordinary air pollution. It is a complex mix of fine particulate matter, gases, and aerosolized chemicals produced by the... https://zipcheckup.com/guides/best-indoor-air-quality-monitors/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-indoor-air-quality-monitors/ Why Monitor Indoor Air? {#why-monitor} According to EPA research, Americans spend approximately 90% of their time indoors — and indoor air can be two to five times more polluted than outdoor air,... https://zipcheckup.com/guides/best-iron-filters-well-water/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-iron-filters-well-water/ Iron in Well Water — The Problem {#iron-problem} Iron is one of the most common water quality problems affecting private wells in the United States. The EPA estimates 13–15 million households rely on... https://zipcheckup.com/guides/best-lead-paint-test-kits/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-lead-paint-test-kits/ Why Test for Lead Paint? {#why-test} Lead-based paint was used extensively in American homes until it was banned for residential use in 1978. At its peak, lead accounted for up to 50% of paint... https://zipcheckup.com/guides/best-mold-test-kits/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-mold-test-kits/ Why Test for Mold? {#why-test} Mold is not a rare problem. The CDC estimates that one in four Americans lives in a home with dampness or mold issues. The condition for mold growth is straightforward:... https://zipcheckup.com/guides/best-radon-test-kits/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-radon-test-kits/ Why Test for Radon {#why-test} Radon is a colorless, odorless, radioactive gas produced by the natural decay of uranium in soil and rock. It seeps into buildings through foundation cracks, gaps... https://zipcheckup.com/guides/best-refrigerator-water-filters/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-refrigerator-water-filters/ Why Replace Fridge Filters Every 6 Months {#why-replace} The six-month replacement recommendation isn't a marketing invention — it reflects three distinct failure modes that affect refrigerator... https://zipcheckup.com/guides/best-shower-filters/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-shower-filters/ Why a Shower Filter? {#why-shower-filter} Municipal water systems in the United States are required by the EPA to maintain a disinfectant residual throughout the distribution system. For chlorinated... https://zipcheckup.com/guides/best-sump-pumps/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-sump-pumps/ Why You Need a Sump Pump {#why-you-need-a-sump-pump} Basement flooding is the most common and most expensive form of residential water damage. According to FEMA, approximately 14 million homes in the... https://zipcheckup.com/guides/best-under-sink-reverse-osmosis-systems/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-under-sink-reverse-osmosis-systems/ What Is Reverse Osmosis? {#what-is-ro} Reverse osmosis (RO) is a water purification process that forces pressurized water through a semi-permeable membrane with pore sizes of approximately 0.0001... https://zipcheckup.com/guides/best-water-softeners/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-water-softeners/ Why Soften Your Water? {#why-soften} Hard water is responsible for a cascade of household problems that most homeowners recognize but rarely trace back to a single cause. The minerals behind it —... https://zipcheckup.com/guides/best-water-testing-kits/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-water-testing-kits/ Why Test Your Water {#why-test} Your utility's annual Consumer Confidence Report (CCR) tells you what left the treatment plant — it does not tell you what comes out of your tap. Between the plant and... https://zipcheckup.com/guides/best-whole-house-water-filters/ Sun, 19 Apr 2026 00:00:00 GMT https://zipcheckup.com/guides/best-whole-house-water-filters/ What Is a Whole-House (POE) Filter? {#what-is-poe} A whole-house water filter — also called a point-of-entry (POE) system — treats water as it enters your home, before it reaches any fixture. Every... https://zipcheckup.com/guides/best-water-filters-by-contaminant/ Sat, 21 Mar 2026 00:00:00 GMT https://zipcheckup.com/guides/best-water-filters-by-contaminant/ How to Use This Guide {#how-to-use} Start with your contaminants, not with a filter brand. 1. Find out what's in your water — check your ZIP code report or your utility's annual Consumer Confidence... https://zipcheckup.com/guides/flood-risk-homebuyer-guide/ Sat, 21 Mar 2026 00:00:00 GMT https://zipcheckup.com/guides/flood-risk-homebuyer-guide/ Why Flood Risk Matters for Buyers {#why-flood-risk-matters} Flooding is the most common and costly natural disaster in the United States. FEMA reports that just 1 inch of floodwater causes... https://zipcheckup.com/guides/home-inspection-water-checklist/ Sat, 21 Mar 2026 00:00:00 GMT https://zipcheckup.com/guides/home-inspection-water-checklist/ Why Water Matters in Home Buying {#why-check-water} A home inspection tells you about the roof, foundation, and HVAC — but most standard inspections skip water quality entirely. That's a problem,... https://zipcheckup.com/guides/home-safety-score-explained/ Sat, 21 Mar 2026 00:00:00 GMT https://zipcheckup.com/guides/home-safety-score-explained/ What Is the Home Safety Score? {#what-is-the-score} The Home Safety Score is a composite rating from 0 to 100 that summarizes measurable environmental risk factors for any U.S. ZIP code. It combines... https://zipcheckup.com/guides/lead-in-water-complete-guide/ Sat, 21 Mar 2026 00:00:00 GMT https://zipcheckup.com/guides/lead-in-water-complete-guide/ Why Lead Matters {#why-lead-matters} Lead is one of the most dangerous contaminants found in U.S. drinking water — not because of how much is present, but because there is no safe level of exposure.... https://zipcheckup.com/guides/moving-checklist-water-utilities/ Sat, 21 Mar 2026 00:00:00 GMT https://zipcheckup.com/guides/moving-checklist-water-utilities/ Before Moving Day {#before-moving} 2–4 Weeks Before 1. Research your new ZIP code — check the ZipCheckup report for water quality violations, lead levels, radon risk, and flood claims. This tells you... https://zipcheckup.com/guides/pfas-forever-chemicals-guide/ Sat, 21 Mar 2026 00:00:00 GMT https://zipcheckup.com/guides/pfas-forever-chemicals-guide/ What Are PFAS? {#what-are-pfas} Per- and polyfluoroalkyl substances (PFAS) are a family of over 12,000 synthetic chemicals that have been manufactured since the 1940s. They're used in non-stick... https://zipcheckup.com/guides/radon-testing-mitigation-guide/ Sat, 21 Mar 2026 00:00:00 GMT https://zipcheckup.com/guides/radon-testing-mitigation-guide/ What Is Radon? {#what-is-radon} Radon is a naturally occurring radioactive gas produced by the decay of uranium in soil, rock, and water. It is colorless, odorless, and tasteless — impossible to... https://zipcheckup.com/guides/understanding-water-quality-reports/ Sat, 21 Mar 2026 00:00:00 GMT https://zipcheckup.com/guides/understanding-water-quality-reports/ What Is a CCR? {#what-is-ccr} A Consumer Confidence Report (CCR) — also called a Water Quality Report or Annual Drinking Water Quality Report — is a document your water utility must publish every... https://zipcheckup.com/guides/well-water-safety-guide/ Sat, 21 Mar 2026 00:00:00 GMT https://zipcheckup.com/guides/well-water-safety-guide/ Why Well Water Is Different {#why-well-water-differs} Approximately 43 million Americans — about 13% of the U.S. population — rely on private wells for their drinking water (EPA Private Wells).... https://zipcheckup.com/guides/best-arsenic-water-filters/ Mon, 16 Mar 2026 00:00:00 GMT https://zipcheckup.com/guides/best-arsenic-water-filters/ Arsenic in Drinking Water {#arsenic-in-water} Arsenic is a naturally occurring element found in rock formations throughout the world. When groundwater flows through arsenic-bearing geological... https://zipcheckup.com/guides/best-lead-water-filters/ Mon, 16 Mar 2026 00:00:00 GMT https://zipcheckup.com/guides/best-lead-water-filters/ Why Lead in Water Matters {#why-lead-matters} Lead is a potent neurotoxin with no known safe level of exposure. The EPA, CDC, and American Academy of Pediatrics all agree: no amount of lead in... https://zipcheckup.com/guides/best-pfas-water-filters/ Mon, 16 Mar 2026 00:00:00 GMT https://zipcheckup.com/guides/best-pfas-water-filters/ What Are PFAS? {#what-are-pfas} Per- and polyfluoroalkyl substances (PFAS) are a family of over 12,000 synthetic chemicals manufactured since the 1940s. The carbon-fluorine bond in PFAS is one of the...