Norristown Water Hardness & Quality Report (2026)
Water Hardness
11.9 grains per gallon
Source
reservoir
pH Level
8.4
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
517.5 mg/L
Est. Daily Cost
$0.54
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Norristown, your appliances are currently losing 27% efficiency due to mineral buildup.
| Appliance | In Norristown | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 2.9 yrs | 8.5 yrs | -66% |
| Washing Machine | 6.1 yrs | 12 yrs | -49% |
| Water Heater | 7.5 yrs | 15 yrs | -50% |
Regional Water Comparison
How Norristown compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Norristown, Pennsylvania | 203.5 mg/L | 10.5 ppt | 🔴 Very Hard | reservoir |
| East Norriton, Pennsylvania | 110.5 mg/L | 5.5 ppt | 🟡 Moderately Hard | reservoir |
| West Norriton, Pennsylvania | 195 mg/L | 10 ppt | 🔴 Very Hard | reservoir |
| King of Prussia, Pennsylvania | 91 mg/L | 4.5 ppt | 🟡 Moderately Hard | reservoir |
| Radnor, Pennsylvania | 141 mg/L | 7.2 ppt | 🟠 Hard | reservoir |
National Benchmark
How Norristown compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Norristown | 203.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Norristown's Water Unique?
Local geology and source profile
Norristown, Pennsylvania, the Montgomery County seat — a major southeast Pennsylvania urban community (Norristown is the Montgomery County seat and has one of the highest population densities among Montgomery County municipalities — a historically significant Pennsylvania mill town and county government center on the Schuylkill River), home of the historic Norristown State Hospital (a major Pennsylvania psychiatric institution established in 1880 — one of the oldest in the state), a diverse Montgomery County community with a significant Puerto Rican-American, Mexican-American, and African-American majority population (Norristown has one of the most diverse populations in Montgomery County), and a community undergoing significant revitalization efforts in the Schuylkill River Valley — draws its municipal water supply from the Schuylkill River via the Norristown Municipal Water Division. Water hardness in Norristown measures 203.5 mg/L — classified as very hard.
Norristown's very hard supply reflects the Schuylkill River watershed's highly calcareous southeastern Pennsylvania Great Valley carbonate geology. The Schuylkill River at Norristown–Montgomery County drains: the Cambrian–Ordovician Conestoga Limestone and Ledger Dolomite (highly calcareous limestone and dolomite of the SE Pennsylvania Great Valley — the primary carbonate of the Reading Prong and Great Valley); the Cambrian Chickies Quartzite (calcareous-poor, but minor); and the limestone-rich Gettysburg Formation (Triassic calcareous). Norristown Water treatment produces the very hard 203.5 mg/L.
At 203.5 mg/L, Norristown residents face severe hard water challenges. Weekly descaling and appliance protection measures are strongly recommended. Norristown Municipal Water Division consistently delivers water meeting all Pennsylvania DEP and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Schuylkill River via the Norristown Municipal Water Division — the Montgomery County southeast Pennsylvania suburban corridor (Cambrian–Ordovician calcareous Conestoga Limestone and Ledger Dolomite of the southeastern Pennsylvania Great Valley carbonate belt — the highly calcareous Schuylkill Valley carbonate; Schuylkill River supply with treatment); very hard supply at 203.5 mg/L in Montgomery County.