1
Hard water (9.8 gpg) can cause scale buildup in pipes and appliances but is generally safe to drink.
2
Chlorine levels are within EPA limits but may affect taste and smell.

Current Score

78 / 100

Good

"Good" threshold (70)

McKinney tap water is sourced from Lake Lavon and treated by North Texas Municipal Water District. Water hardness is hard at 9.8 GPG which may cause scale buildup. Overall purity score: 78/100 (Good). Updated for 2026.

Need a Filter?

We've matched the best filters for McKinney's specific water issues.

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The Best Water Filter For McKinney Homes

Matched to local water issues and filtration standards.

Best for McKinney

Waterdrop 10UA Under-Sink Filter

Under-Sink Carbon Filter

Price Range $40–60

Top Pick for McKinney

Waterdrop 10UA Under-Sink Filter

McKinney has elevated chlorine residuals. An under-sink carbon filter removes chlorine and disinfection byproducts at the tap.

Why this fits McKinney

Removes chlorine and chloramine taste and odor
Reduces disinfection byproducts THMs and HAAs
Easy installation and filter lasts 6 to 12 months

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Want to know exactly what's in YOUR tap?

City reports show averages. Your home may be different — especially with older pipes.

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Frequently Asked Questions

Is McKinney TX tap water safe to drink in 2026?

McKinney tap water meets EPA federal drinking water standards and scores 78/100 (Good) on PurityMap for 2026. For most healthy adults the water is considered safe but point-of-use filtration adds an important layer of protection.

Does McKinney TX use chlorine or chloramine for disinfection?

McKinney uses chloramine as the primary disinfectant with a residual level of 1.4 ppm. Chloramine is harder to remove than free chlorine and requires a catalytic carbon or reverse osmosis filter. Standard Brita-style pitchers will NOT remove chloramine.

How hard is McKinney TX water and what is the TDS level?

McKinney water hardness is 9.8 grains per gallon (hard) with a TDS of 345 ppm (poor). This level causes noticeable scale buildup in water heaters kettles and dishwashers. A water softener is recommended to protect plumbing and reduce soap usage.

Has PFAS been found in McKinney TX drinking water?

Based on available EPA UCMR5 monitoring data as of 2026 PFAS have not been detected above EPA advisory levels in McKinney drinking water.