Clarkston Water Hardness & Quality Report (2026)
Water Hardness
6 grains per gallon
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
202.6 mg/L
Est. Daily Cost
$0.27
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 Clarkston, your appliances are currently losing 14% efficiency due to mineral buildup.
| Appliance | In Clarkston | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.2 yrs | 8.5 yrs | -27% |
| Washing Machine | 9.8 yrs | 12 yrs | -18% |
| Water Heater | 11.5 yrs | 15 yrs | -23% |
Regional Water Comparison
How Clarkston compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Clarkston, Georgia | 102.5 mg/L | 5.9 ppt | 🟡 Moderately Hard | reservoir |
| Scottdale, Georgia | 101 mg/L | 5.8 ppt | 🟡 Moderately Hard | reservoir |
| Tucker, Georgia | 111 mg/L | 6.5 ppt | 🟡 Moderately Hard | reservoir |
| Belvedere Park, Georgia | 147.5 mg/L | 9.2 ppt | 🟠 Hard | reservoir |
| Decatur, Georgia | 112 mg/L | 6.6 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Clarkston compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Clarkston | 102.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Clarkston's Water Unique?
Local geology and source profile
Clarkston, Georgia, in DeKalb County — a DeKalb County city adjacent to Tucker and Stone Mountain in metro Atlanta — receives its water from the DeKalb County Water, drawing from the Chattahoochee River (DeKalb County) through the metro Atlanta distribution.
The moderately soft 102.5 mg/L hardness and TDS of 202.6 mg/L reflect the metro Atlanta DeKalb County Chattahoochee supply's moderate character — slightly harder than the typical Georgia Piedmont communities (Lilburn GA: 74/148; Dallas GA: 62.5/113) because Clarkston's DeKalb County position in the metro Atlanta distribution accumulates more calcareous contact from treatment and distribution residence time (compare Lilburn GA: 74/148 in Gwinnett County softer; Clarkston moderately harder from the DeKalb County distribution). The Chattahoochee River at DeKalb County — Precambrian Stone Mountain Granite (insoluble — primary dilutant), Cambrian Ocoee Supergroup (insoluble — secondary dilutant), and Quaternary Piedmont alluvium (slightly calcareous — primary hardness contributor).
At 102.5 mg/L with TDS 203, Clarkston's water is moderately soft. Appliances last well with standard maintenance. Annual descaling is appropriate. The PFAS level of 5.9 ppt warrants a certified drinking water filter — the DeKalb County metro Atlanta industrial and military (Dobbins ARB proximity) corridor contribute to Clarkston's elevated readings.
Geology & Source: Clarkston in DeKalb County is served by DeKalb County Water drawing from the Chattahoochee River — the Chattahoochee watershed drains Precambrian Stone Mountain Granite (insoluble) and Quaternary Piedmont alluvium (slightly calcareous) — GA DeKalb County Chattahoochee River Precambrian insoluble supply produces moderately soft water at 102.5 mg/L with TDS 202.6 mg/L.