1
Hard water (10.8 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

75 / 100

Good

"Good" threshold (70)

Round Rock tap water is sourced from Lake Georgetown and treated by City of Round Rock Utilities. Water hardness is very hard at 10.8 GPG which may cause scale buildup. Overall purity score: 75/100 (Good). Updated for 2026.

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

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The Best Water Filter For Round Rock Homes

Matched to local water issues and filtration standards.

Best for Round Rock

iSpring WGB32B 3-Stage Whole House

Whole-House Carbon Filter

Price Range $230–270

Top Pick for Round Rock

iSpring WGB32B 3-Stage Whole House

Round Rock has very hard water (10.8 GPG) and elevated chlorine. A whole-house carbon plus softener system handles both.

Why this fits Round Rock

Reduces hardness from 10.8 GPG to soft water
Whole-house chlorine and chloramine removal
Protects all appliances pipes and water heaters

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As an Amazon Associate, PurityMap may earn from qualifying purchases. Prices may vary.

Also Recommended

AFWFilters 5600sxt 48,000 Grain Softener

Salt-Based Water Softener — $650–750

Buy on Amazon

Want to know exactly what's in YOUR tap?

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

Buy Test Kit on Amazon ($25–30)

Frequently Asked Questions

Is Round Rock TX tap water safe to drink in 2026?

Round Rock tap water meets EPA federal drinking water standards and scores 75/100 (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 Round Rock TX use chlorine or chloramine for disinfection?

Round Rock uses chloramine as the primary disinfectant with a residual level of 1.3 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 Round Rock TX water and what is the TDS level?

Round Rock water hardness is 10.8 grains per gallon (very hard) with a TDS of 385 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 Round Rock TX drinking water?

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