Georgetown water hardness

Last reviewed: September 12, 2026

Georgetown Utility Systems publishes hardness by treatment plant, not as a single citywide number. Homes on Lake Georgetown and Southlake WTP see hard water. Homes on Park Plant and Southside WTP see very hard water. Use the plant pages for the cited ranges, then decide whether a plumber, a Water Treatment Specialist, or neither is the next step.

Treatment plant	Hardness	Grains per gallon	USGS class
Lake Georgetown and Southlake WTP	176–178 mg/L as CaCO3	10–11 gpg	Hard
Park Plant and Southside WTP	309–320 mg/L as CaCO3	19 gpg	Very hard

Treatment plants

Lake Georgetown and Southlake WTP — 176–178 mg/L as CaCO3, 10–11 gpg
Park Plant and Southside WTP — 309–320 mg/L as CaCO3, 19 gpg

USGS hardness classes

Soft: 0–60 mg/L as CaCO3
Moderately hard: 61–120 mg/L as CaCO3
Hard: 121–180 mg/L as CaCO3
Very hard: greater than 181 mg/L as CaCO3

System mineral ranges

The same city article lists recent mineral content as ranges, not street-level tests:

Calcium: 44.8 to 95.5 mg/L
Magnesium: 11.5 to 19.7 mg/L
Sodium: 20.4 to 30.4 mg/L
Sulfate: 29 to 38 mg/L
Total dissolved solids: 284 to 419 mg/L
Alkalinity: 133 to 270 mg/L

What this site will and will not do

These pages explain published figures, chloramine and resin trade-offs, and what belongs in a written treatment spec. Daily household use in sizing math is 75 gallons per person. We do not sell rankings, run door-to-door tests, or install equipment.

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Frequently Asked Questions

How hard is Georgetown tap water?

It depends on the treatment plant that serves the address. Lake Georgetown and Southlake WTP publishes 176–178 mg/L as CaCO3 (10–11 gpg, USGS Hard). Park Plant and Southside WTP publishes 309–320 mg/L as CaCO3 (19 gpg, USGS Very hard).

Which USGS hardness class applies?

USGS bands used here are Soft: 0–60 mg/L as CaCO3; Moderately hard: 61–120 mg/L as CaCO3; Hard: 121–180 mg/L as CaCO3; Very hard: greater than 181 mg/L as CaCO3. Southlake-area published values fall in Hard. Park Plant published values fall in Very hard.

Do you test water at the door?

No. We do not perform door to door tests. These pages cite Georgetown Utility Systems. Installation, if any, is by a separately licensed Water Treatment Specialist or plumber.

How do grains per gallon relate to milligrams per liter?

Softener settings are often in grains per gallon. One grain per gallon equals 17.1 mg/L as CaCO3. The plant pages show both units from the same city article.

How do I find a plumber after reading these hardness pages?

Use the license-verified plumber directory. This site does not book jobs or sell contractor leads.

Not affiliated with Georgetown Utility Systems or the City of Georgetown. We do not perform door to door tests. Installation, if any, is by a separately licensed Water Treatment Specialist or plumber.

Source

Hardness and mineral ranges on these pages come from Georgetown Utility Systems knowledge-base article 20398, last updated May 8, 2026.