Is Redding, CA Tap Water Safe to Drink?
Redding tap water is legally compliant, but one contaminant exceeds health guidelines. Specifically: PFAS above EPA limits (PFOA: 14.1 ppt, PFOS: 11.05 ppt — limit is 4 ppt each). A point-of-use filter is recommended for drinking and cooking water.
Hardness Scale: Where Redding Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Redding Compares
Redding's water is 75% softer than the national average of 138 PPM - ranking in the bottom 78% for hardness nationwide. Most homes here do not need a softener. Within California, it ranks #82 of 87 cities (81% below the state average of 180 PPM). Among cities (50k-100k), Redding ranks #218 of 258 for hardness.
What Redding's Water Means for Your Home
Hardness: 35 PPM - Low Concern
Redding's water is slightly hard at 35 PPM. Most households won't notice any issues at this level. Scale buildup is minimal, and a water softener would be overkill. Redding is softer than 78% of US cities. If you're thinking about water treatment, contaminant filtration is where to focus your money, not softening.
Contaminants & Safety
Forever chemicals (PFAS) are a serious concern here. Redding has PFOA at 14.1 ppt and PFOS at 11.05 ppt — the EPA's 2024 limit is 4 ppt for PFOA and PFOS individually. PFAS don't break down in your body or the environment. Research links long-term exposure to increased cancer risk, thyroid issues, and immune system problems. The fix: a whole-house activated carbon filter or a point-of-use reverse osmosis system. Look for NSF P473 certification — that's the standard that specifically tests for PFAS removal.
What's in the Treatment Process
Redding's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 27 ppb (34% of the legal limit, but 180x 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 0.214 ppb, which is 11x 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.
| Contaminant | Detected | Health Guideline | Legal Limit | Status |
|---|---|---|---|---|
| Hardness (as CaCO₃) | 35 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 50 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 55.2 ppt | — | No total limit | Detected |
| ↳ PFOA | 14.1 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| ↳ PFOS | 11.05 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| Lead | 2.1 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 0.7 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 1.04 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Recommended Filter for Redding
PFAS exceed EPA limits (PFOA: 14.1 ppt, PFOS: 11.05 ppt — limit: 4 ppt each). A certified filter reduces these contaminants effectively.
How to Test Your Water in Redding
With PFAS at 55.2 ppt in Redding'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 City of Redding Public Works's annual Consumer Confidence Report for official city-level data.
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About Redding's Water Supply
Water Utility: City of Redding Public Works
Water Source: Sacramento River & Whiskeytown Reservoir (Surface Water)
Population Served: 89,628
Hardness: 35 PPM (2 grains per gallon)
Redding's drinking water comes from surface sources — Sacramento River & Whiskeytown Reservoir. 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. On the upside, surface sources often deliver softer water than deep aquifers. The system serves 90,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request City of Redding Public Works'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 City of Redding Public Works in Redding, CA, including ZIP codes:
95417, 95428, 95429, 95454, 95488, 95501, 95502, 95503, 95511, 95514, 95518, 95519, 95521, 95524, 95525, 95526, 95527, 95528, 95534, 95536, 95537, 95540, 95542, 95545, 95546, 95547, 95549, 95550, 95551, 95552, 95553, 95554, 95558, 95559, 95560, 95562, 95563, 95564, 95565, 95569, 95570, 95571, 95573, 95585, 95587, 95589, 95595, 95913, 95915, 95926, 95927, 95928, 95929, 95939, 95942, 95943, 95951, 95954, 95963, 95969, 95973, 95976, 95978, 95980, 95984, 95988, 96001, 96002, 96003, 96007, 96008, 96009, 96010, 96011, 96013, 96016, 96017, 96019, 96020, 96021, 96022, 96024, 96025, 96028, 96029, 96031, 96033, 96035, 96040, 96041, 96046, 96047, 96048, 96049, 96051, 96052, 96054, 96055, 96056, 96057, 96059, 96061, 96062, 96063, 96065, 96067, 96068, 96069, 96070, 96071, 96073, 96074, 96075, 96076, 96078, 96079, 96080, 96084, 96087, 96088, 96089, 96090, 96091, 96092, 96093, 96095, 96096, 96099, 96119, 96132, 96137
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Redding to Other California Cities
Frequently Asked Questions About Redding Water
Is Redding tap water safe to drink?
Where does Redding's water come from?
Do I need a water softener in Redding?
How do I remove PFAS from Redding tap water?
What water filter is best for Redding?
Is Redding water safe for babies and infants?
What are disinfection byproducts in Redding's water?
Is chromium-6 in Redding's water?
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 Redding Homeowners Actually Buy
Prioritized for contaminant reduction for homes with 35 PPM water and PFAS above EPA limits.
Affiliate disclosure: we may earn a commission. Selection based on Redding's water data.