Mountain Park Water Hardness & Quality Report (2026)
Water Hardness
5.9 grains per gallon
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
199.4 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 Mountain Park, your appliances are currently losing 14% efficiency due to mineral buildup.
| Appliance | In Mountain Park | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.3 yrs | 8.5 yrs | -26% |
| Washing Machine | 9.8 yrs | 12 yrs | -18% |
| Water Heater | 11.5 yrs | 15 yrs | -23% |
Regional Water Comparison
How Mountain Park compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Mountain Park, Georgia | 101.5 mg/L | 5.8 ppt | 🟡 Moderately Hard | reservoir |
| Lilburn, Georgia | 84.5 mg/L | 4.6 ppt | 🟡 Moderately Hard | reservoir |
| Tucker, Georgia | 111 mg/L | 6.5 ppt | 🟡 Moderately Hard | reservoir |
| Redan, Georgia | 150.5 mg/L | 9.5 ppt | 🟠 Hard | reservoir |
| Snellville, Georgia | 73 mg/L | 3.7 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Mountain Park compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Mountain Park | 101.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Mountain Park's Water Unique?
Local geology and source profile
Mountain Park, Georgia, in Gwinnett County — a Gwinnett County city adjacent to Snellville and Lawrenceville in northeast Atlanta suburbs — receives its water from Gwinnett County Water Resources, drawing from Lake Sidney Lanier on the Chattahoochee River through the north Georgia metropolitan distribution.
The moderately hard 101.5 mg/L hardness and TDS of 199.4 mg/L reflect the Gwinnett County Lake Lanier supply's moderate character — the Precambrian Piedmont Gneiss is highly insoluble while Cambrian Ocoee Supergroup calcareous metamorphics contribute modest dissolved minerals to the north Georgia Piedmont watershed (compare Snellville GA: 99/194 in Gwinnett County comparable; Lawrenceville GA: 104/204 in Gwinnett County comparable; Mountain Park consistent moderate from the same Gwinnett County Lake Lanier Precambrian supply). The Chattahoochee-Lanier watershed — Precambrian Piedmont Gneiss (insoluble — primary dilutant), Cambrian Ocoee Supergroup (slightly calcareous — primary hardness contributor), and Quaternary Piedmont alluvium (slightly calcareous — minor TDS).
At 101.5 mg/L with TDS 199, Mountain Park's water is moderately hard — mild scale buildup in appliances. Semi-annual descaling is appropriate. The PFAS level of 5.8 ppt is moderate — a certified drinking water filter provides added protection. Review Gwinnett County Water Resources' annual water quality report for the latest monitoring data.
Geology & Source: Mountain Park in Gwinnett County draws from the Gwinnett County Water on Lake Lanier reservoir (Gwinnett County, north Georgia) — the Chattahoochee watershed at Gwinnett County drains Precambrian Piedmont Gneiss (insoluble) and Cambrian Ocoee Supergroup (slightly calcareous) — Georgia Gwinnett County Lake Lanier Precambrian supply produces moderately hard water at 101.5 mg/L with TDS 199.4 mg/L.