Is Madison, MS Tap Water Safe to Drink?
Yes, Madison tap water is safe to drink. Hardness is low at 20 PPM, and no contaminants exceed health guidelines. Most homes here don't need treatment.
Hardness Scale: Where Madison Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Madison Compares
Madison's water is 86% softer than the national average of 138 PPM - ranking in the bottom 93% for hardness nationwide. Most homes here do not need a softener. Within Mississippi, it ranks #10 of 11 cities (63% below the state average of 54 PPM). Among smaller cities, Madison ranks #262 of 288 for hardness.
What Madison's Water Means for Your Home
Hardness: 20 PPM - Low Concern
Madison's water is slightly hard at 20 PPM. Most households won't notice any issues at this level. Scale buildup is minimal, and a water softener would be overkill. Madison is softer than 93% of US cities. If you're thinking about water treatment, contaminant filtration is where to focus your money, not softening.
Contaminants & Safety
Disinfection byproducts are the notable finding here. Madison's water has TTHMs at 50.3 ppb and HAA5 at 21.8 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 Madison draws from groundwater, the treatment process still generates disinfection byproducts: TTHMs at 50.3 ppb and HAA5 at 21.8 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) | 20 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 40 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 | 1.1 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 | Not reported | 5 mg/L | 10 mg/L | N/A |
Good news for Madison residents. Your water quality is generally good. Most homes in this area do not need a water softener. If you have concerns about lead (especially in buildings constructed before 1986) or chlorine taste, a point-of-use filter is the most practical and cost-effective solution.
Quick Fix for Chlorine: Shower Filter
At 1.5 mg/L chlorine, many Madison 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 Madison
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 Madison Water's annual Consumer Confidence Report for official city-level data.
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About Madison's Water Supply
Water Utility: City of Madison Water
Water Source: Ross Barnett Reservoir (Groundwater)
Population Served: 16,136
Hardness: 20 PPM (1.2 grains per gallon)
Madison draws its drinking water from groundwater sources — Ross Barnett Reservoir. 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 16,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request City of Madison 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 Madison Water in Madison, MS, including ZIP codes:
38704, 38721, 38722, 38723, 38744, 38745, 38748, 38749, 38751, 38753, 38754, 38756, 38761, 38765, 38776, 38778, 38780, 38923, 38924, 38941, 38946, 38954, 38959, 39038, 39039, 39040, 39045, 39046, 39047, 39051, 39054, 39057, 39061, 39063, 39067, 39071, 39079, 39080, 39087, 39088, 39090, 39094, 39095, 39097, 39098, 39107, 39108, 39109, 39110, 39113, 39115, 39117, 39130, 39146, 39157, 39158, 39159, 39160, 39161, 39162, 39163, 39166, 39169, 39171, 39173, 39174, 39176, 39177, 39179, 39189, 39192, 39194, 39320, 39325, 39327, 39337, 39339, 39346, 39350, 39359, 39365, 39745, 39772
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Madison to Other Mississippi Cities
Frequently Asked Questions About Madison Water
Is Madison tap water safe to drink?
Where does Madison's water come from?
Do I need a water softener in Madison?
What are disinfection byproducts in Madison's water?
Why does Madison water taste like chlorine?
Can I drink Madison tap water straight from the faucet?
How does Madison compare to the Mississippi average?
What water filter is best for Madison?
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 Madison Homeowners Actually Buy
Common purchases for homes with 20 PPM water.
Affiliate disclosure: we may earn a commission. Selection based on Madison's water data.