Warren Water Hardness & Quality Report (2026)
Water Hardness
9.1 grains per gallon
Source
river
pH Level
8
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
316.3 mg/L
Est. Daily Cost
$0.41
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 Warren, your appliances are currently losing 21% efficiency due to mineral buildup.
| Appliance | In Warren | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.5 yrs | 8.5 yrs | -47% |
| Washing Machine | 7.8 yrs | 12 yrs | -35% |
| Water Heater | 9.4 yrs | 15 yrs | -37% |
Regional Water Comparison
How Warren compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Warren, Michigan | 155.5 mg/L | 8.9 ppt | 🟠 Hard | river |
| Eastpointe, Michigan | 215 mg/L | 11.9 ppt | 🔴 Very Hard | river |
| Roseville, Michigan | 244 mg/L | 13.4 ppt | 🔴 Very Hard | river |
| Fraser, Michigan | 153 mg/L | 8.8 ppt | 🟠 Hard | river |
| Sterling Heights, Michigan | 134 mg/L | 7.8 ppt | 🟠 Hard | river |
National Benchmark
How Warren compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Warren | 155.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Warren's Water Unique?
Local geology and source profile
Warren, Michigan — one of the largest cities in Michigan and a major Detroit metropolitan suburb — receives its municipal water supply from the Great Lakes Water Authority (GLWA) and the Macomb County Public Works distribution network, sourcing from Lake Huron via the Detroit River system. GLWA operates the Lake Huron Water Treatment Plant and distributes treated water through a regional infrastructure serving southeastern Michigan. Warren, located in Macomb County immediately north of Detroit, draws treated Great Lakes water from GLWA's distribution system under a long-term contract. Water hardness in Warren measures 155.5 mg/L — classified as hard.
Warren's hard supply reflects the mineral character of Lake Huron water and the geological influence of the Great Lakes watershed. Lake Huron drains a vast watershed encompassing Precambrian Canadian Shield (Archean granite, gneiss, and greenstone belts — inherently calcium-poor) in Ontario and northern Michigan, combined with the Silurian Michigan Basin dolomite (Niagara Group, Salina Group) and Devonian carbonate formations of the Lower Peninsula. The Silurian Salina Group evaporite sequence — including the Salina A-1 Carbonate and dolomite beds — contributes particularly high dissolved calcium to Michigan Basin groundwater and surface water, and Great Lakes water circulating over this carbonate basin terrain accumulates significant mineral content before treatment.
At 155.5 mg/L, Warren residents encounter regular hard water challenges. Scale deposits form on faucet aerators, showerheads, tile, and inside appliances within weeks — monthly descaling with citric acid solution is a standard maintenance practice. Dishwashers produce better glassware results with rinse-aid, and water heaters should be inspected annually for element scale accumulation. GLWA and Macomb County Public Works consistently deliver water meeting all Michigan EGLE and EPA Safe Drinking Water Act requirements throughout the southeastern Michigan service area.
Geology & Source: River supply from the Great Lakes — Detroit River system via the Great Lakes Water Authority (GLWA) and Detroit Water and Sewerage Department — Lake Huron water travels through the Detroit River to Macomb County distribution; the Precambrian Canadian Shield and Silurian dolomite Great Lakes watershed produces moderately hard supply at 155.5 mg/L.