Moorpark Water Hardness & Quality Report (2026)
Water Hardness
3.7 grains per gallon
Source
mixed
pH Level
7.4
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
141.9 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 Moorpark, your appliances are currently losing 8% efficiency due to mineral buildup.
| Appliance | In Moorpark | 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 Moorpark compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Moorpark, California | 63.5 mg/L | 3.7 ppt | 🟡 Moderately Hard | mixed |
| Simi Valley, California | 109 mg/L | 5.1 ppt | 🟡 Moderately Hard | mixed |
| Fillmore, California | 90 mg/L | 4.5 ppt | 🟡 Moderately Hard | mixed |
| Thousand Oaks, California | 188 mg/L | 7.4 ppt | 🔴 Very Hard | mixed |
| Oak Park, California | 138.5 mg/L | 5.9 ppt | 🟠 Hard | mixed |
National Benchmark
How Moorpark compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Moorpark | 63.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Moorpark's Water Unique?
Local geology and source profile
Moorpark, California, in Ventura County — a major east Ventura County community in the Simi Valley–Moorpark corridor (Moorpark is adjacent to Simi Valley and is in one of the fastest-growing areas of Ventura County), home of Moorpark College (a community college known for its Exotic Animal Training and Management program — one of the only college exotic animal training programs in the world, with lions, tigers, bears, and numerous exotic species maintained as live training subjects on campus), a diverse Ventura County community with a growing tech and manufacturing professional population, and adjacent to the Santa Monica Mountains National Recreation Area — draws its municipal water supply from the Moorpark groundwater basin and MWD import via the Calleguas Municipal Water District. Water hardness in Moorpark measures 63.5 mg/L — classified as soft.
Moorpark's soft supply reflects the Ventura County MWD import's calcareous-poor characteristics and the Arroyo Simi watershed's moderate softness. The MWD State Water Project supply (Sierra Nevada snowmelt via the California Aqueduct — calcareous-poor, approximately 30–60 mg/L) dominates the Calleguas Municipal Water District supply blend. The local Moorpark groundwater basin (Arroyo Simi alluvium — calcareous-moderate) is mixed with the soft MWD import, producing the soft 63.5 mg/L.
With hardness at 63.5 mg/L, Moorpark residents enjoy soft water. Calleguas Municipal Water District consistently delivers water meeting all California State Water Board and EPA Safe Drinking Water Act requirements.
Geology & Source: Groundwater from the Moorpark Groundwater Basin (Arroyo Simi watershed) and Metropolitan Water District (MWD) import via the Ventura County Waterworks District No. 1 (Calleguas Municipal Water District) — the Ventura County east suburban Simi Valley corridor (Quaternary calcareous-poor Simi Valley alluvium and MWD State Water Project blend; soft supply at 63.5 mg/L in Ventura County.