Covina Water Hardness & Quality Report (2026)
Water Hardness
9.9 grains per gallon
Source
mixed
pH Level
8.2
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
510.4 mg/L
Est. Daily Cost
$0.45
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 Covina, your appliances are currently losing 23% efficiency due to mineral buildup.
| Appliance | In Covina | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4 yrs | 8.5 yrs | -53% |
| Washing Machine | 7.3 yrs | 12 yrs | -39% |
| Water Heater | 8.8 yrs | 15 yrs | -41% |
Regional Water Comparison
How Covina compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Covina, California | 170 mg/L | 6.8 ppt | 🟠 Hard | mixed |
| Vincent, California | 167.5 mg/L | 6.8 ppt | 🟠 Hard | mixed |
| Azusa, California | 52 mg/L | 3.4 ppt | 🟢 Soft | mixed |
| Glendora, California | 129 mg/L | 5.6 ppt | 🟠 Hard | mixed |
| West Covina, California | 48 mg/L | 3.3 ppt | 🟢 Soft | mixed |
National Benchmark
How Covina compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Covina | 170 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Covina's Water Unique?
Local geology and source profile
Covina, California, in the east San Gabriel Valley of Los Angeles County — a classic post-World War II east San Gabriel Valley suburb known for its historic Old Town Covina district, the Covina Center for the Performing Arts, and a diverse community with large Latino and Filipino-American populations — draws its municipal water supply from the Main San Gabriel Basin groundwater and SGVMWD MWD imports via the City of Covina Water Division. Water hardness in Covina measures 170 mg/L — classified as hard.
Covina's hard supply reflects the east San Gabriel Valley alluvial basin's blended supply characteristics. The Main San Gabriel Basin at Covina receives: MWD Colorado River Aqueduct imports (approximately 270–310 mg/L) percolated through SGVMWD spreading grounds and local recharge basins; local San Gabriel Mountains granitic alluvial fan recharge (San Dimas Granodiorite and San Gabriel Anorthosite Complex alluvial fan deposits — moderate calcareous contribution); and some deeper basin groundwater of longer residence time. The Covina distribution zone, with infrastructure dating from the 1950s–1970s post-war East San Gabriel Valley buildout, produces the hard 170 mg/L at household taps.
At 170 mg/L, Covina residents face regular hard water challenges. Scale deposits form on faucet aerators, showerheads, and appliances within weeks — monthly descaling with citric acid solution is standard maintenance. City of Covina Water Division consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from the San Gabriel Valley Municipal Water District (SGVMWD) MWD import and the Main San Gabriel Basin Watermaster groundwater via the City of Covina Water Division — the east San Gabriel Valley Main San Gabriel Basin Quaternary alluvial aquifer (MWD Colorado River import + San Gabriel Mountains granitic alluvial recharge); hard supply at 170 mg/L in Los Angeles County.