Is Redondo Beach, CA Tap Water Safe to Drink?
Yes, Redondo Beach tap water is safe to drink. No contaminants exceed health guidelines. However, Redondo Beach has very hard water at 180 PPM, which will cause scale buildup in plumbing and appliances over time. A water softener is worth considering.
Hardness Scale: Where Redondo Beach Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Redondo Beach Compares
Redondo Beach's water is 30% harder than the national average of 138 PPM. It ranks #382 out of 1000 cities in our database (harder than 62% of US cities we track). Within California, it ranks #58 of 87 cities (0% below the state average of 180 PPM). Among cities (50k-100k), Redondo Beach ranks #115 of 258 for hardness. At this hardness level, water heaters run an estimated 33% less efficiently due to scale insulation, and major water-using appliances typically last 3 years less than the national average lifespan.
What Redondo Beach's Water Means for Your Home
Hardness: 180 PPM - Treatment Recommended
Redondo Beach has some seriously hard water. At 180 PPM (10.5 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 180 PPM increases household costs through scale-coated water heaters that use more energy, extra soap and detergent, and appliances that wear out faster. Most Redondo Beach homeowners don't realize it until the plumber shows up.
Contaminants & Safety
Beyond hardness, Redondo Beach's water is within EPA guidelines for regulated contaminants. Chlorine sits at 1.5 mg/L — normal for municipal systems, but enough to notice. 4 contaminants exceed EWG's stricter health guidelines, though all are within legal limits. If your water tastes like a pool or your skin feels dry after showers, a whole-house carbon filter is the simplest fix. A shower filter is a quick, affordable starting point that most people notice immediately. Want the full picture? Request your utility's annual Consumer Confidence Report for neighborhood-level data.
How Hard Water Affects Your Home
At 180 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) | 180 PPM | < 60 PPM | No federal limit | ⚠ Hard |
| Total Dissolved Solids | 300 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | Not tested | — | No total limit | N/A |
| Lead | 3 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 1.5 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 0.281 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Recommendations for Redondo Beach Homes
Our Top Picks for Redondo Beach (180 PPM)
Hard water at 180 PPM causes scale buildup, increased energy use, and premature appliance failure. A softener protects your plumbing and appliances.
Quick Fix for Chlorine: Shower Filter
At 1.5 mg/L chlorine, many Redondo Beach 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 Redondo Beach
With 180 PPM hardness, a quick test strip confirms whether your specific tap matches Redondo Beach's average before you invest in a softener. Hardness can vary within the same system.
Free option: Request Cal Water's annual Consumer Confidence Report for official city-level data.
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About Redondo Beach's Water Supply
Water Utility: Cal Water
Water Source: West Basin MWD + groundwater (Surface Water)
Population Served: 71,763
Hardness: 180 PPM (10.5 grains per gallon)
Redondo Beach's drinking water comes from surface sources — West Basin MWD + groundwater. 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 72,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request Cal Water'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 Cal Water in Redondo Beach, CA, including ZIP codes:
90274, 90275, 90277, 90278, 90717, 90732
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Water Softener Sizing for Redondo Beach
At 180 PPM (10.5 GPG), here is how to size a softener for your Redondo Beach home. Multiply hardness in GPG (10.5) by daily water usage (roughly 50 gallons per person). A family of four uses about 200 gallons/day: 10.5 GPG × 200 gal = 2100 grains/day. Over a 7-day regeneration cycle, that is 14,700 grains - a 32,000-grain softener is the right fit for most Redondo Beach households.
Compare Redondo Beach to Other California Cities
Frequently Asked Questions About Redondo Beach Water
Is Redondo Beach tap water safe to drink?
Where does Redondo Beach's water come from?
Do I need a water softener in Redondo Beach?
Does Redondo Beach water damage tankless water heaters?
How much does hard water cost a Redondo Beach household per year?
What is the hardness of Redondo Beach water in grains per gallon?
What size water softener do I need for Redondo Beach?
Salt-based softener or salt-free conditioner for Redondo Beach?
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 Redondo Beach Homeowners Actually Buy
Common purchases for homes with 180 PPM water.
Affiliate disclosure: we may earn a commission. Selection based on Redondo Beach's water data.