Hard water in Altoona, PA
County estimate from 1,436 water samples in Blair County · July 2026
- PA typical
- 127 mg/L
- EPA health violations since 2016
- 3
- Softener for 3 people
- 24k grain
- Data
- County estimate
Water samples from around Altoona put hardness at about 133 mg/L (7.8 gpg), which would be hard on the USGS scale. Treat this as a rough guide: it is the median of 1,436 samples taken across Blair County, mostly wells and streams, not a test of Altoona's treated tap water. One more reason for caution: EPA lists Altoona's water system as using surface water, which is often softer than the wells behind the county figure.
Altoona sits close to the typical Pennsylvania figure of 127 mg/L. Of the 10 nearest cities we track, 7 have softer water and 3 have harder. The range nearby runs from 26 mg/L in Treasure Lake to 178 in Park Forest Village.
What 133 mg/L means at home
Expect white crust on faucets and showerheads, plus spots on dishes that come out of the dishwasher.
Kettles collect scale quickly. Water heaters build up sediment at the bottom of the tank, which makes them work harder over time.
Soap and detergent need a little more to lather, and soap scum shows up in the tub.
Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.
What to do about it
At 133 mg/L most of the trouble is scale, and only a few things deal with it.
Ion-exchange water softener
The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.
Salt-free conditioner
No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.
Reverse osmosis or carbon filter
Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.
3 people × 75 gallons a day × 7.8 gpg = 1,750 grains a day. A 24,000-grain unit regenerates about every 13 days.
EPA record for Altoona's water system
3 health-based violations since 2016
Serves about 62,500 people from surface water.
- Health-based
- 3
- Monitoring or reporting
- 84
- Open now
- 0
EPA lists this system as serving Altoona.
| Contaminant or rule | Violations | Period | Status |
|---|---|---|---|
| Total Coliform Rulebacteria | 2 | 2025 | Resolved |
| Surface Water Treatment Rulefiltration and disinfection | 1 | 2016 | Resolved |
Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.
Questions
Is Altoona water hard?
Yes. It measures about 133 mg/L (7.8 grains per gallon), which the USGS classes as hard.
What is the water hardness in Altoona in grains per gallon?
About 7.8 gpg. One grain per gallon equals 17.1 mg/L, so 133 mg/L divided by 17.1 gives 7.8.
What size water softener do I need in Altoona?
For 3 people using 75 gallons each per day, 7.8 gpg works out to about 1,750 grains a day. A 24,000-grain softener covers that with a regeneration about every 13 days.
Has the Altoona water system had EPA violations?
EPA records show 3 health-based violations for Altoona Water Authority since 2016, involving Total Coliform Rule, Surface Water Treatment Rule. There were also 84 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Park Forest Village178 mg/LHard
- State College178 mg/LHard
- Treasure Lake26 mg/LSoft
- Chambersburg54 mg/LSoft
- Greensburg57 mg/LSoft
- Jeannette66 mg/LModerately hard
- Carlisle176 mg/LHard
- Plum66 mg/LModerately hard
- Connellsville47 mg/LSoft
- Monroeville96 mg/LModerately hard
All 172 cities in Pennsylvania
Hardness data: TapWaterData US Water Hardness (county estimate, July 4, 2026), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.