Is West Covina, CA Tap Water Safe to Drink?
West Covina tap water is legally compliant, but 2 contaminants exceed health guidelines. Specifically: PFAS above EPA limits (PFOA: 4.85 ppt, PFOS: 4.25 ppt — limit is 4 ppt each); nitrate at 5.42 mg/L (above the health guideline of 5 mg/L). A point-of-use filter is recommended for drinking and cooking water. West Covina also has very hard water at 195 PPM.
Hardness Scale: Where West Covina Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How West Covina Compares
West Covina's water is 41% harder than the national average of 138 PPM. It ranks #330 out of 1000 cities in our database (harder than 67% of US cities we track). Within California, it ranks #40 of 87 cities (8% above the state average of 180 PPM). Among smaller cities, West Covina ranks #77 of 288 for hardness. At this hardness level, water heaters run an estimated 36% less efficiently due to scale insulation, and major water-using appliances typically last 3 years less than the national average lifespan.
What West Covina's Water Means for Your Home
Hardness: 195 PPM - Treatment Recommended
West Covina has some seriously hard water. At 195 PPM (11.4 grains per gallon), your tap is loaded with mineral content carried in from the watershed geology. Here's the thing: it's perfectly safe to drink. The minerals won't hurt you. But they will hurt your wallet. That adds up. Hard water at 195 PPM increases household costs through scale-coated water heaters that use more energy, extra soap and detergent, and appliances that wear out faster. Most West Covina homeowners don't realize it until the plumber shows up. That's 8% harder than the California average.
Contaminants & Safety
Forever chemicals (PFAS) are worth watching here. West Covina has PFOA at 4.85 ppt and PFOS at 4.25 ppt, exceeding the EPA's 2024 limit of 4 ppt per compound. PFAS are synthetic compounds that accumulate in your body over time. A certified carbon filter or reverse osmosis system with NSF P473 certification is the most effective protection. See the regulatory timeline.
What's in the Treatment Process
West Covina's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 25.7 ppb (32% of the legal limit, but 171x the EWG guideline) and HAA5 at 36.2 ppb (60% of the legal limit, but 362x the EWG guideline). These are within legal limits, but the EWG sets much tighter thresholds based on cancer-risk research. A whole-house activated carbon filter reduces both chlorine and byproducts.
Chromium-6 was detected at 2.04 ppb, which is 102x the EWG health guideline. There's no separate federal limit for chromium-6, only total chromium. A reverse osmosis system is the most effective removal method. All measurements are within federal legal limits. The EWG guidelines represent a more conservative, health-based standard.
How Hard Water Affects Your Home
At 195 PPM, untreated hard water has measurable effects on household costs and appliance life:
- Water heater inefficiency: Scale insulation forces the heater to work harder (DOE estimates up to 22% more energy for heavily scaled units)
- Soap and detergent: Hard water reduces lathering, requiring significantly more product
- Appliance replacement: Water heaters, dishwashers, and washing machines fail 2-4 years earlier due to scale buildup
- Plumbing maintenance: Scale buildup in pipes reduces flow and requires more frequent service
Note: Impact varies by household size, water usage, and local energy costs. A home water test provides the most accurate assessment for your specific situation.
| Contaminant | Detected | Health Guideline | Legal Limit | Status |
|---|---|---|---|---|
| Hardness (as CaCO₃) | 195 PPM | < 60 PPM | No federal limit | ⚠ Very Hard |
| Total Dissolved Solids | 234 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 24.3 ppt | — | No total limit | Detected |
| ↳ PFOA | 4.85 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| ↳ PFOS | 4.25 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| Lead | 6.7 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ⚠ Elevated |
| Chlorine / Chloramine | 1.1 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 5.42 mg/L | 5 mg/L | 10 mg/L | ⚠ Elevated |
Recommendations for West Covina Homes
Our Top Picks for West Covina (195 PPM)
Hard water at 195 PPM causes scale buildup, increased energy use, and premature appliance failure. A softener protects your plumbing and appliances.
Recommended Filter for West Covina
PFAS exceed EPA limits (PFOA: 4.85 ppt, PFOS: 4.25 ppt — limit: 4 ppt each). A certified filter reduces these contaminants effectively.
Quick Fix for Chlorine: Shower Filter
At 1.1 mg/L chlorine, many West Covina residents notice dry skin, brittle hair, and that "pool smell" in the shower. A shower filter installs in 5 minutes, no tools needed.
How to Test Your Water in West Covina
With PFAS at 24.3 ppt in West Covina's supply, confirming your home's specific levels is especially important. PFAS vary by neighborhood and can concentrate differently depending on your position in the distribution system.
Free option: Request San Gabriel Valley Water Co's annual Consumer Confidence Report for official city-level data.
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About West Covina's Water Supply
Water Utility: San Gabriel Valley Water Co
Water Source: Imported Colorado River water & local wells (Surface Water)
Population Served: 7,775
Hardness: 195 PPM (11.4 grains per gallon)
West Covina's drinking water comes from surface sources — Imported Colorado River water & local wells. Surface water requires more extensive treatment than groundwater, including coagulation, filtration, and disinfection. This heavier chlorination is why disinfection byproducts tend to be higher in surface-supplied systems. Despite the treatment process, mineral hardness from the watershed carries through. The system serves 8,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request San Gabriel Valley Water Co's Consumer Confidence Report (CCR) or test your own tap.
ZIP Codes Covered by This Report
This water quality data applies to all areas served by San Gabriel Valley Water Co in West Covina, CA, including ZIP codes:
91008, 91010, 91702, 91706, 91714, 91715, 91716, 91722, 91723, 91724, 91740, 91741, 91744, 91745, 91746, 91747, 91748, 91749, 91788, 91789, 91790, 91791, 91792, 91793
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Water Softener Sizing for West Covina
At 195 PPM (11.4 GPG), here is how to size a softener for your West Covina home. Multiply hardness in GPG (11.4) by daily water usage (roughly 50 gallons per person). A family of four uses about 200 gallons/day: 11.4 GPG × 200 gal = 2280 grains/day. Over a 7-day regeneration cycle, that is 15,960 grains - a 32,000-grain softener is the right fit for most West Covina households.
Compare West Covina to Other California Cities
Frequently Asked Questions About West Covina Water
Is West Covina tap water safe to drink?
Where does West Covina's water come from?
Do I need a water softener in West Covina?
Is West Covina water safe for babies and infants?
How do I remove PFAS from West Covina tap water?
What water filter is best for West Covina?
Does West Covina water damage tankless water heaters?
Do I need both a softener AND a filter in West Covina?
Data sources: Lead and copper data from EPA Safe Drinking Water Act LCR reporting. Contaminant data from utility-reported testing results. PFAS data from EPA UCMR5 (2023–2025). Hardness from USGS and municipal reports. Data reflects system-level testing results and may not match your specific tap due to neighborhood plumbing, season, or recent utility changes. For your utility's latest results, request their Consumer Confidence Report (CCR). Our methodology. Last updated: 2026-02-24.
What West Covina Homeowners Actually Buy
Prioritized for contaminant reduction for homes with 195 PPM water and PFAS above EPA limits.
Affiliate disclosure: we may earn a commission. Selection based on West Covina's water data.