Pottstown Water Hardness & Quality Report (2026)
Water Hardness
6.9 grains per gallon
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
213.3 mg/L
Est. Daily Cost
$0.32
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 Pottstown, your appliances are currently losing 16% efficiency due to mineral buildup.
| Appliance | In Pottstown | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.7 yrs | 8.5 yrs | -33% |
| Washing Machine | 9.2 yrs | 12 yrs | -23% |
| Water Heater | 10.9 yrs | 15 yrs | -27% |
Regional Water Comparison
How Pottstown compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Pottstown, Pennsylvania | 118.5 mg/L | 6 ppt | 🟡 Moderately Hard | reservoir |
| Limerick, Pennsylvania | 186.5 mg/L | 9.6 ppt | 🔴 Very Hard | reservoir |
| Phoenixville, Pennsylvania | 190.5 mg/L | 9.8 ppt | 🔴 Very Hard | reservoir |
| West Chester, Pennsylvania | 126.5 mg/L | 6.4 ppt | 🟠 Hard | reservoir |
| Reading, Pennsylvania | 153 mg/L | 7.8 ppt | 🟠 Hard | reservoir |
National Benchmark
How Pottstown compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Pottstown | 118.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Pottstown's Water Unique?
Local geology and source profile
Pottstown, Pennsylvania, in Montgomery County on the Schuylkill River — a historic mill town with Steel Technologies and industrial heritage in the upper Schuylkill Valley — receives its municipal water from the Pottstown Borough Authority Water Treatment Plant, which draws from the Schuylkill River at a riverside intake upstream of the Pottstown metropolitan area. The Schuylkill River is one of eastern Pennsylvania's most important industrial and water supply rivers, flowing through the anthracite coal region before reaching the Montgomery County and Philadelphia suburbs.
The moderately hard 118.5 mg/L hardness and TDS of 213.3 mg/L reflect the Schuylkill River's mixed watershed geology upstream of Pottstown. The Schuylkill headwaters in the Reading Prong drain Precambrian Grenville gneiss and related crystalline rocks of the Pennsylvania Highlands — a soft-water terrain. However, major tributaries entering the Schuylkill in the valley bring inputs from the Pennsylvania Valley and Ridge Province (Ordovician Trenton and Black River limestones, Cambrian Conestoga Formation carbonates, Ordovician shales), adding moderate carbonate hardness to the river. The Schuylkill also carries dissolved mineral inputs from the anthracite coal drainage in its upper watershed, contributing to the elevated TDS.
At 118.5 mg/L, Pottstown's water is moderately hard — consistent with the upper Schuylkill Valley supply profile. Scale builds in kettles and coffee machines over months, the dishwasher benefits from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling of heating appliances is appropriate. The PFAS level of 6.0 ppt warrants a certified drinking water filter — the Schuylkill River corridor's long industrial and mining history, legacy steel and chemical plants in the valley, and the broader southeastern Pennsylvania military-industrial complex contribute to PFAS in the upper Schuylkill supply.
Geology & Source: Pottstown in Montgomery County draws from the Pottstown Borough Authority treating the Schuylkill River — the Schuylkill drains the Reading Prong (Precambrian gneiss) and Valley and Ridge Province (Ordovician and Cambrian carbonate and shale) of eastern Pennsylvania — mixed Piedmont and carbonate tributary drainage from the Pennsylvania Valley and Ridge produces moderately hard water at 118.5 mg/L in this Schuylkill River mill town.