Norco Water Hardness & Quality Report (2026)
Water Hardness
3.7 grains per gallon
Source
mixed
pH Level
7.4
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
139.9 mg/L
Est. Daily Cost
$0.17
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 Norco, your appliances are currently losing 8% efficiency due to mineral buildup.
| Appliance | In Norco | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.5 yrs | 8.5 yrs | -12% |
| Washing Machine | 11.3 yrs | 12 yrs | -6% |
| Water Heater | 13.1 yrs | 15 yrs | -13% |
Regional Water Comparison
How Norco compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Norco, California | 63 mg/L | 3.7 ppt | 🟡 Moderately Hard | mixed |
| Eastvale, California | 188.5 mg/L | 7.3 ppt | 🔴 Very Hard | mixed |
| Corona, California | 135.5 mg/L | 5.8 ppt | 🟠 Hard | mixed |
| Jurupa Valley, California | 156 mg/L | 6.4 ppt | 🟠 Hard | mixed |
| Pedley, California | 191.5 mg/L | 7.4 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Norco compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Norco | 63 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Norco's Water Unique?
Local geology and source profile
Norco, California, in Riverside County — a major west Inland Empire equestrian community (Norco is a significant Riverside County city — one of the most distinctive communities in the Inland Empire; Norco is officially known as 'Horsetown USA' — a city that actively promotes an equestrian lifestyle (Norco has more horses per capita than almost any other city in the United States; the city's residential zoning encourages and protects equestrian uses — horse keeping, riding trails, and equestrian facilities are central to Norco's identity; the city has an extensive network of horse trails running throughout its residential neighborhoods; the Norco Horsemen's Association organizes regular equestrian events)); Norco is adjacent to the massive Naval Weapons Station Seal Beach Detachment Norco (the Norco facility — a significant Navy ammunition and technical operations facility in the Inland Empire); Norco is also known for the Norco riot of 1980 (one of the most violent bank robberies and police pursuits in California history — the robbers shot down a police helicopter and had a running gun battle with police across multiple Riverside County jurisdictions), a diverse Riverside County community — draws its municipal water supply via the Western Municipal Water District. Water hardness in Norco measures 63 mg/L — classified as moderately soft.
Norco's moderate softness reflects the west Riverside County Santa Ana River alluvial basin's calcareous-poor character. The WMWD distributes Temescal Valley and imported supply with effective treatment, producing the moderately soft 63 mg/L.
With hardness at 63 mg/L, Norco residents enjoy moderately soft water. Western Municipal Water District consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from the Temescal Valley Groundwater Basin and WMWD import via the Western Municipal Water District — the Riverside County west Inland Empire Norco corridor (Quaternary calcareous-poor Santa Ana River alluvium — the calcareous-poor west Riverside County Santa Ana alluvial basin; effective treatment); moderately soft supply at 63 mg/L in Riverside County.