Is Biloxi, MS Tap Water Safe to Drink?
Yes, Biloxi tap water is safe to drink. Hardness is low at 100 PPM, and no contaminants exceed health guidelines. Most homes here don't need treatment.
Hardness Scale: Where Biloxi Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Biloxi Compares
Biloxi's water is 28% softer than the national average of 138 PPM - ranking in the bottom 56% for hardness nationwide. Most homes here do not need a softener. Within Mississippi, Biloxi has the 2nd hardest water out of 11 cities - 85% above the state average of 54 PPM. Among smaller cities, Biloxi ranks #133 of 288 for hardness.
What Biloxi's Water Means for Your Home
Hardness: 100 PPM - Low Concern
Biloxi's water is firmly in the moderate range at 100 PPM. You'll see some spotting on glassware and a film on shower doors over time, but it's not the kind of hardness that demands a full softener. The minerals come from the local aquifer geology. A salt-free conditioner is worth considering if you have a tankless water heater or high-end fixtures.
Contaminants & Safety
Disinfection byproducts are the notable finding here. Biloxi's water has TTHMs at 36 ppb and HAA5 at 11.8 ppb — both within legal limits, but the EWG health guidelines are far stricter. These byproducts form when chlorine reacts with organic matter during treatment. A whole-house activated carbon filter reduces both chlorine and its byproducts. Want the full picture? Request your utility's annual Consumer Confidence Report.
What's in the Treatment Process
Even though Biloxi draws from groundwater, the treatment process still generates disinfection byproducts: TTHMs at 36 ppb and HAA5 at 11.8 ppb. Groundwater typically needs less treatment than surface water, but when organic compounds are present in the aquifer, chlorination creates the same byproducts. All levels are within legal limits, though above the stricter EWG health guidelines. 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) | 100 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 151 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 0 ppt | — | No total limit | ✓ ND |
| ↳ PFOA | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| ↳ PFOS | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| Lead | 1 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 1.8 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | Not reported | 5 mg/L | 10 mg/L | N/A |
Recommendations for Biloxi Homes
Quick Fix for Chlorine: Shower Filter
At 1.8 mg/L chlorine, many Biloxi 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 Biloxi
City-wide data is a solid starting point, but your specific tap might differ based on plumbing age, distance from the treatment plant, or seasonal changes.
Free option: Request City of Biloxi Water's annual Consumer Confidence Report for official city-level data.
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About Biloxi's Water Supply
Water Utility: City of Biloxi Water
Water Source: Biloxi River & wells (Groundwater)
Population Served: 23,310
Hardness: 100 PPM (5.8 grains per gallon)
Biloxi draws its drinking water from groundwater sources — Biloxi River & wells. Groundwater typically requires less treatment than surface water because the earth acts as a natural filter. The tradeoff: dissolved minerals from underground rock formations, which is why mineral content varies by aquifer depth and geology. The geological profile determines hardness, iron, and trace mineral levels. The system serves 23,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request City of Biloxi 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 City of Biloxi Water in Biloxi, MS, including ZIP codes:
39452, 39530, 39531, 39532, 39533, 39534, 39535, 39540, 39552, 39553, 39562, 39563, 39564, 39565, 39566, 39567, 39568, 39569, 39581, 39595
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Biloxi to Other Mississippi Cities
Frequently Asked Questions About Biloxi Water
Is Biloxi tap water safe to drink?
Where does Biloxi's water come from?
Do I need a water softener in Biloxi?
What is the hardness of Biloxi water in grains per gallon?
What are disinfection byproducts in Biloxi's water?
Why does Biloxi water taste like chlorine?
Can I drink Biloxi tap water straight from the faucet?
How does Biloxi compare to the Mississippi average?
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 Biloxi Homeowners Actually Buy
Common purchases for homes with 100 PPM water.
Affiliate disclosure: we may earn a commission. Selection based on Biloxi's water data.