Monroe Water Hardness & Quality Report (2026)
Water Hardness
6.5 grains per gallon
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
228.7 mg/L
Est. Daily Cost
$0.30
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 Monroe, your appliances are currently losing 15% efficiency due to mineral buildup.
| Appliance | In Monroe | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.9 yrs | 8.5 yrs | -31% |
| Washing Machine | 9.5 yrs | 12 yrs | -21% |
| Water Heater | 11.1 yrs | 15 yrs | -26% |
Regional Water Comparison
How Monroe compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Monroe, North Carolina | 112 mg/L | 6 ppt | 🟡 Moderately Hard | reservoir |
| Indian Trail, North Carolina | 133 mg/L | 7 ppt | 🟠 Hard | reservoir |
| Stallings, North Carolina | 126.5 mg/L | 6.7 ppt | 🟠 Hard | reservoir |
| Waxhaw, North Carolina | 104.5 mg/L | 5.6 ppt | 🟡 Moderately Hard | reservoir |
| Mint Hill, North Carolina | 104 mg/L | 5.5 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Monroe compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Monroe | 112 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Monroe's Water Unique?
Local geology and source profile
Monroe, North Carolina, the Union County seat — a major south Charlotte suburban community (Monroe is the Union County seat and the largest city in Union County — one of the fastest-growing counties in the Charlotte metropolitan area, with Monroe serving as the main commercial hub), home of Andrew Jackson State Park (commemorating Andrew Jackson, the seventh US President and the only president born in Union County, North Carolina — the exact birthplace of President Jackson on the North Carolina–South Carolina border is a matter of some historical dispute, but North Carolina and Union County both claim the birthplace), a diverse Union County community with a significant Latino-American and African-American population, and a rapidly growing Charlotte south suburban community in the I-74 corridor — draws its municipal water supply from the Richardson Creek Reservoir via the City of Monroe Water Division. Water hardness in Monroe measures 112 mg/L — classified as moderately hard.
Monroe's moderate hardness reflects the Union County Rocky River watershed's calcareous-moderate North Carolina Piedmont crystalline geology. The Richardson Creek (Rocky River watershed) at Monroe–Union County drains the Carolina Inner Piedmont Belt (Precambrian–Paleozoic calcareous-moderate gneiss and schist — the Union County crystalline Piedmont). City of Monroe treatment produces the moderate 112 mg/L.
At 112 mg/L, Monroe residents encounter moderate scale accumulation. Monthly cleaning with citric acid solution is recommended. City of Monroe Water Division consistently delivers water meeting all North Carolina DEQ and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Richardson Creek Reservoir (Rocky River watershed) via the City of Monroe Water Division — the Union County south North Carolina Charlotte suburban corridor (Precambrian–Paleozoic calcareous-moderate Carolina Inner Piedmont gneiss — the Union County crystalline Piedmont; Richardson Creek watershed supply with treatment); moderately hard supply at 112 mg/L in Union County.