Is Baltimore, MD Tap Water Safe to Drink?
Yes, Baltimore tap water is safe to drink. Hardness is low at 60 PPM, and no contaminants exceed health guidelines. Most homes here don't need treatment.
Hardness Scale: Where Baltimore Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Baltimore Compares
Baltimore's water is 57% softer than the national average of 138 PPM - ranking in the bottom 66% for hardness nationwide. Most homes here do not need a softener. Within Maryland, it ranks #8 of 15 cities (10% below the state average of 67 PPM). Among major US cities (500k+), Baltimore ranks #73 of 100 for hardness.
What Baltimore's Water Means for Your Home
Hardness: 60 PPM - Low Concern
Baltimore's water is moderately hard at 60 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. 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. Baltimore's water has TTHMs at 53.3 ppb and HAA5 at 31.6 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
Baltimore's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 53.3 ppb (67% of the legal limit, but 355x the EWG guideline) and HAA5 at 31.6 ppb (53% of the legal limit, but 316x 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. 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) | 60 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 90 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 3 ppt | — | No total limit | Detected |
| ↳ PFOA | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| ↳ PFOS | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| Lead | 2.7 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 1.4 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 1.22 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Recommendations for Baltimore Homes
Quick Fix for Chlorine: Shower Filter
At 1.4 mg/L chlorine, many Baltimore 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 Baltimore
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 Baltimore DPW's annual Consumer Confidence Report for official city-level data.
📊 Already Tested Your Water?
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About Baltimore's Water Supply
Water Utility: Baltimore DPW
Water Source: Liberty + Prettyboy Reservoirs (Surface Water)
Population Served: 1,600,000
Hardness: 60 PPM (3.5 grains per gallon)
Baltimore's drinking water comes from surface sources — Liberty + Prettyboy Reservoirs. 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 1.6 million residents.
Water quality can vary by neighborhood and season. For your exact numbers, request Baltimore DPW'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 Baltimore DPW in Baltimore, MD, including ZIP codes:
21020, 21022, 21023, 21030, 21031, 21065, 21071, 21093, 21094, 21117, 21133, 21136, 21139, 21153, 21201, 21202, 21203, 21204, 21205, 21206, 21207, 21208, 21209, 21210, 21211, 21212, 21213, 21214, 21215, 21216, 21217, 21218, 21220, 21221, 21222, 21223, 21224, 21227, 21228, 21229, 21230, 21231, 21233, 21234, 21235, 21236, 21237, 21239, 21240, 21241, 21244, 21250, 21251, 21252, 21263, 21264, 21270, 21273, 21275, 21278, 21279, 21280, 21281, 21282, 21284, 21285, 21286, 21287, 21288, 21289, 21290, 21297, 21298
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Baltimore to Other Maryland Cities
Frequently Asked Questions About Baltimore Water
Is Baltimore tap water safe to drink?
Where does Baltimore's water come from?
Do I need a water softener in Baltimore?
What is the hardness of Baltimore water in grains per gallon?
What are disinfection byproducts in Baltimore's water?
Why does Baltimore water taste like chlorine?
Can I drink Baltimore tap water straight from the faucet?
What water filter is best for Baltimore?
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 Baltimore Homeowners Actually Buy
Common purchases for homes with 60 PPM water.
Affiliate disclosure: we may earn a commission. Selection based on Baltimore's water data.