Park Plant and Southside WTP
Last reviewed: September 12, 2026
Georgetown Utility Systems lists hardness for Park Plant and Southside WTP as 309–320 mg/L as CaCO3, about 19 gpg. USGS class for that band is Very hard.
That is plant-level published data, not a test of a single street. Confirm which plant serves the house with Georgetown Utility Systems before you size a softener or blame a water heater on the wrong range. The other published system is Lake Georgetown and Southlake WTP at 176–178 mg/L as CaCO3 (10–11 gpg, Hard).
What hardness does in the house
Hardness is not a health classification. It shows up as scale on heating elements, spots on glass, extra soap demand, and sediment in water heaters. A plumber diagnoses fixtures, heaters, and leaks. A Water Treatment Specialist, where licensed, designs treatment. Those are different licenses.
Next reads
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.