Yorba Linda Water Hardness & Quality Report (2026)
Water Hardness
4.3 grains per gallon
Source
mixed
pH Level
7.5
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
167.5 mg/L
Est. Daily Cost
$0.19
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 Yorba Linda, your appliances are currently losing 10% efficiency due to mineral buildup.
| Appliance | In Yorba Linda | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.2 yrs | 8.5 yrs | -15% |
| Washing Machine | 10.9 yrs | 12 yrs | -9% |
| Water Heater | 12.7 yrs | 15 yrs | -15% |
Regional Water Comparison
How Yorba Linda compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Yorba Linda, California | 73 mg/L | 4 ppt | 🟡 Moderately Hard | mixed |
| Placentia, California | 137 mg/L | 5.9 ppt | 🟠 Hard | mixed |
| Brea, California | 51.5 mg/L | 3.4 ppt | 🟢 Soft | mixed |
| Orange, California | 45.5 mg/L | 3.2 ppt | 🟢 Soft | mixed |
| Fullerton, California | 53 mg/L | 3.4 ppt | 🟢 Soft | mixed |
National Benchmark
How Yorba Linda compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Yorba Linda | 73 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Yorba Linda's Water Unique?
Local geology and source profile
Yorba Linda, California, in northern Orange County at the foothills of the Puente Hills — birthplace of President Richard Nixon and one of Orange County's most affluent communities — draws its municipal water supply through the Yorba Linda Water District (YLWD), sourcing from the Municipal Water District of Orange County (MWDOC) which delivers a blend of Metropolitan Water District of Southern California (MWD) imported water and the Orange County Water District (OCWD) managed groundwater basin supply. Water hardness in Yorba Linda measures 73 mg/L — classified as moderately soft.
Yorba Linda's moderately soft supply for a Southern California inland community reflects the OCWD managed groundwater basin's advanced water quality management. The Orange County Groundwater Basin is one of the most intensively managed aquifer systems in the United States — OCWD actively recharges the basin using spreading operations in the Santa Ana River flood plain with treated MWD imported water (soft SWP and Colorado River blend). Additionally, OCWD operates the Groundwater Replenishment System (GWRS) — the world's largest advanced water purification facility — which produces ultra-pure recycled water injected into the basin. This intensive management maintains the Orange County basin's supply at lower hardness than naturally occurring coastal aquifer water.
With hardness at 73 mg/L, Yorba Linda residents enjoy moderately soft water. Yorba Linda Water District consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from Municipal Water District of Orange County (MWDOC) — Metropolitan Water District (MWD) imports (Colorado River Aqueduct and State Water Project) and the Orange County Water District (OCWD) Groundwater Basin — the Santa Ana River alluvial basin recharge zone; moderately soft supply at 73 mg/L in Orange County — reflecting a higher SWP blend and OCWD groundwater replenishment with treated soft water.