McComb Water Hardness & Quality Report (2026)
Water Hardness
3.3 grains per gallon
Source
groundwater
pH Level
7.3
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
133.7 mg/L
Est. Daily Cost
$0.15
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 McComb, your appliances are currently losing 7% efficiency due to mineral buildup.
| Appliance | In McComb | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.8 yrs | 8.5 yrs | -8% |
| Washing Machine | 11.5 yrs | 12 yrs | -4% |
| Water Heater | 13.4 yrs | 15 yrs | -11% |
Regional Water Comparison
How McComb compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ McComb, Mississippi | 56 mg/L | 3.7 ppt | 🟢 Soft | groundwater |
| Brookhaven, Mississippi | 38.5 mg/L | 3.1 ppt | 🟢 Soft | groundwater |
| Hammond, Louisiana | 52 mg/L | 6.4 ppt | 🟢 Soft | river |
| Central, Louisiana | 68 mg/L | 7.5 ppt | 🟡 Moderately Hard | river |
| Zachary, Louisiana | 149 mg/L | 12.9 ppt | 🟠 Hard | river |
National Benchmark
How McComb compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ McComb | 56 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes McComb's Water Unique?
Local geology and source profile
McComb, Mississippi, in Pike County — the Pike County seat adjacent to Magnolia and Summit in southwest Mississippi — receives its water from the City of McComb Water, drawing from the Catahoula Formation aquifer (Pike County) through the southwest Mississippi distribution.
The soft 56 mg/L hardness and TDS of 133.7 mg/L reflect the southwest Mississippi Pike County Catahoula aquifer supply's soft character — the Miocene Catahoula Formation's slightly calcareous sandy sediments and Oligocene Forest Hill insoluble sands contribute low hardness, typical of the southwest Mississippi Gulf Coastal Plain communities (compare Grenada MS: 106/300 harder from the north Mississippi alluvial aquifer; McComb softer from the Pike County coastal plain insoluble formation). The Catahoula aquifer at Pike County — Miocene Catahoula Formation (slightly calcareous — primary hardness contributor), Oligocene Forest Hill Sand (insoluble — dilutant), and Quaternary Coastal Plain alluvium (slightly calcareous — minor TDS).
At 56 mg/L, McComb's water is soft — scale forms very slowly in appliances, dishwashers remain efficient, and no softening is needed. Annual descaling is appropriate. The PFAS level of 3.7 ppt warrants a certified drinking water filter — the Pike County southwest Mississippi industrial corridor contribute to McComb's readings.
Geology & Source: McComb in Pike County draws from the City of McComb Water on the Catahoula Formation aquifer (Pike County, southwest Mississippi) — the Catahoula aquifer at Pike County is developed in Miocene Catahoula Formation (slightly calcareous) and Oligocene Forest Hill Sand (insoluble) — Mississippi Pike County Catahoula Aquifer Miocene-Oligocene calcareous supply produces soft water at 56 mg/L with TDS 133.7 mg/L.