Detailed water safety guides for 25 major US cities. Find out what's in your tap water and which filters actually help.
I've researched the water quality data for 25 of the largest metro areas in the US. Each guide covers your city's known contaminants, EPA violation history, water hardness, and which filters I recommend based on your specific water profile.
Can't find your city? Check out our water filter reviews to find the best filter for your needs.
Key concern: disinfection byproducts. Water hardness: Soft.
Key concern: haloacetic acids. Water hardness: Moderate.
Key concern: GenX/PFAS. Water hardness: Soft.
Key concern: lead. Water hardness: Hard.
Key concern: PFAS. Water hardness: Hard.
Key concern: chromium-6. Water hardness: Soft.
Key concern: lead. Water hardness: Moderate.
Key concern: lead. Water hardness: Moderate.
Key concern: chromium-6. Water hardness: Hard.
Key concern: atrazine. Water hardness: Hard.
Key concern: trihalomethanes. Water hardness: Very Hard.
Key concern: hard water minerals. Water hardness: Very Hard.
Key concern: PFAS. Water hardness: Hard.
Key concern: PFAS. Water hardness: Hard.
Key concern: lead. Water hardness: Hard.
Key concern: PFAS. Water hardness: Moderate.
Key concern: lead. Water hardness: Soft.
Key concern: lead. Water hardness: Soft.
Key concern: PFAS. Water hardness: Moderate.
Key concern: chromium-6. Water hardness: Hard.
Key concern: lead. Water hardness: Soft.
Key concern: Cryptosporidium. Water hardness: Soft.
Key concern: hard water minerals. Water hardness: Very Hard.
Key concern: chromium-6. Water hardness: Hard.
Key concern: lead. Water hardness: Moderate.