Is Round Rock tap water safe to drink?

Yes but with caveats

Round Rock's water meets EPA minimum standards but has some concerns. Filtration is recommended for sensitive individuals.

75/100
Purity Score
3
Issues Found
10.8 GPG
Hardness
Not detected
PFAS

3 Issues Detected in Round Rock

Very Hard Water (10.8 GPG)

Hard water causes scale in pipes and shortens appliance lifespan.

Hardness data for Round Rock

Moderate Chlorine Level

Chlorine within EPA limits but may affect taste.

Chlorine info for Round Rock

Arsenic Approaching Limit (0.3 mg/L)

EPA limit is 0.010 mg/L.

Arsenic info for Round Rock
Texas

786,647,866,578,681 · Lake Georgetown

Round Rock, TX Water Quality Report

Moderate Risk Updated March 2026 133,372 residents
See Best Filters for Round Rock
75
Purity Score

Contaminant Levels

PFAS
ND
Lead
2.5 ppb
Nitrate
0.8 mg/L
Arsenic
0.3 mg/L
Hardness
10.8 gpg

Health Insights

  • 1
    At 10.8 GPG, Round Rock's water qualifies as very hard. This can cause limescale in pipes and shorten appliance lifespan.
  • 2
    Chlorine levels may affect the taste of Round Rock's tap water. A carbon filter improves flavor.

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.

Fix Your Water

Best filters matched to Round Rock's 3 issues.

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Round Rock Water FAQ

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.
What is the best water filter for Round Rock?
Based on Round Rock's water profile, we recommend the AFWFilters 5600sxt 48000 Grain Softener. Round Rock has very hard water (10.8 GPG) and elevated chlorine. A whole-house carbon plus softener system handles both.

Nearby Reports

HoustonTexas — 59/100DallasTexas — 64/100College StationTexas — 69/100LubbockTexas — 71/100San AntonioTexas — 73/100MidlandTexas — 73/100

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Data Sources

  • EPA SDWIS
  • EWG Tap Water Database
  • City of Round Rock Utilities CCR
  • USGS monitoring data

PurityMap compiles public data. Updated March 2026.

© 2026 PurityMap. For informational purposes only.

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