Riverdale Water Hardness & Quality Report (2026)
Water Hardness
5.7 grains per gallon
Source
reservoir
pH Level
7.6
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
183.9 mg/L
Est. Daily Cost
$0.26
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 Riverdale, your appliances are currently losing 13% efficiency due to mineral buildup.
| Appliance | In Riverdale | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.4 yrs | 8.5 yrs | -25% |
| Washing Machine | 10 yrs | 12 yrs | -17% |
| Water Heater | 11.7 yrs | 15 yrs | -22% |
Regional Water Comparison
How Riverdale compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Riverdale, Georgia | 97.5 mg/L | 5.4 ppt | 🟡 Moderately Hard | reservoir |
| Forest Park, Georgia | 95 mg/L | 5.3 ppt | 🟡 Moderately Hard | reservoir |
| College Park, Georgia | 121 mg/L | 7.2 ppt | 🟠 Hard | reservoir |
| East Point, Georgia | 80.5 mg/L | 4.2 ppt | 🟡 Moderately Hard | reservoir |
| Union City, Georgia | 129.5 mg/L | 7.8 ppt | 🟠 Hard | reservoir |
National Benchmark
How Riverdale compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Riverdale | 97.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Riverdale's Water Unique?
Local geology and source profile
Riverdale, Georgia, in Clayton County — a Clayton County city adjacent to College Park and Jonesboro in the south Atlanta metro — receives its municipal water from the Clayton County Water Authority (CCWA), drawing from Lake Spivey and the CCWA water recycling system (Clayton County) — one of the most sophisticated water recycling systems in the southeastern USA.
The moderately hard 97.5 mg/L hardness and TDS of 183.9 mg/L reflect the south Atlanta Piedmont watershed's moderate calcareous character — slightly harder than the Atlanta Chattahoochee River supplies (Atlanta: 75 mg/L) due to the Clayton County Piedmont metamorphic and minor calcareous zone input. Lake Spivey drains the Georgia Piedmont — Precambrian Lithonia Gneiss (mostly insoluble), Precambrian Arabia Mountain granite (insoluble), and Precambrian Pottsville Formation (calcareous shale, minor contribution). The Piedmont crystalline basement produces the moderately hard south Atlanta supply.
At 97.5 mg/L, Riverdale's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 5.4 ppt warrants a certified drinking water filter — the Clayton County south Atlanta industrial corridor and the Georgia PFAS background contribute to Riverdale's readings.
Geology & Source: Riverdale in Clayton County draws from the Clayton County Water Authority on Lake Spivey (Clayton County, south Atlanta metro) — Lake Spivey drains the Georgia Piedmont (Precambrian Lithonia Gneiss, Precambrian Arabia Mountain granite — mostly insoluble) — Georgia Clayton County Piedmont crystalline watershed produces moderately hard water at 97.5 mg/L with TDS 183.9 mg/L in this Clayton County Georgia city.