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Tap water quality report

Baltimore, MD

EPA monitoring detected 15 contaminants across the 2 water suppliers serving Baltimore. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
447
people served
15
contaminants found
Maryland rankings Lead in Maryland PFAS in Maryland

What was found in Baltimore's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
7734.5 µg/L 77%
of the EPA limit 10000 µg/L
Main supplier: SUNNYBROOK · 416 people · 2019
2/2 SYR4
Fluoride
30 µg/L 0.8%
of the EPA limit 4000 µg/L
Main supplier: SUNNYBROOK · 416 people · 2017
Highest in the city: 110 µg/L — PHOENIX · 31 people · 2017
2/2 SYR4
Barium
88.05 µg/L 4.4%
of the EPA limit 2000 µg/L
Main supplier: SUNNYBROOK · 416 people · 2017
1/2 SYR4
TTHM
12.672 µg/L 16%
of the EPA limit 80 µg/L
Main supplier: SUNNYBROOK · 416 people · 2019
Highest in the city: 49.9642 µg/L — PHOENIX · 31 people · 2019
2/2 SYR4
Chloroform
7.4925 µg/L
No EPA limit set
Main supplier: SUNNYBROOK · 416 people · 2019
Highest in the city: 26.295 µg/L — PHOENIX · 31 people · 2019
2/2 SYR4
Bromodichloromethane
4.015 µg/L
No EPA limit set
Main supplier: SUNNYBROOK · 416 people · 2019
Highest in the city: 17.278 µg/L — PHOENIX · 31 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
4.28 µg/L 7.1%
of the EPA limit 60 µg/L
Main supplier: SUNNYBROOK · 416 people · 2019
Highest in the city: 10.05 µg/L — PHOENIX · 31 people · 2019
2/2 SYR4
Dibromochloromethane
2.9625 µg/L
No EPA limit set
Main supplier: SUNNYBROOK · 416 people · 2019
Highest in the city: 8.8 µg/L — PHOENIX · 31 people · 2019
2/2 SYR4
Dichloroacetic Acid
1.97 µg/L
No EPA limit set
Main supplier: SUNNYBROOK · 416 people · 2014
Highest in the city: 6.366 µg/L — PHOENIX · 31 people · 2015
2/2 SYR4
Gross Beta Particle Activity
4.1 pCi/L
No EPA limit set
Highest in the city: PHOENIX · 31 people · 2014
1/2 SYR4
Trichloroacetic Acid
0.8600 µg/L
No EPA limit set
Main supplier: SUNNYBROOK · 416 people · 2014
Highest in the city: 2.63 µg/L — PHOENIX · 31 people · 2015
2/2 SYR4
Xylenes, Total
2.19 µg/L 0%
of the EPA limit 10000 µg/L
Highest in the city: PHOENIX · 31 people · 2019
1/2 SYR4
Bromoform
0.8440 µg/L
No EPA limit set
Main supplier: SUNNYBROOK · 416 people · 2019
Highest in the city: 1.792 µg/L — PHOENIX · 31 people · 2018
2/2 SYR4
Dibromoacetic Acid
1.08 µg/L
No EPA limit set
Main supplier: SUNNYBROOK · 416 people · 2014
2/2 SYR4
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
Main supplier: SUNNYBROOK · 416 people · 2023
2/2 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Baltimore

SupplierPopulation served
SUNNYBROOK 416
PHOENIX 31

Frequently asked questions about Baltimore tap water

Is Baltimore tap water safe to drink?

EPA testing detected 15 contaminants in the water serving Baltimore. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Baltimore?

2 public water suppliers report drinking-water monitoring for Baltimore, Maryland to the EPA. Each is listed above with its population served.

What contaminants are in Baltimore's water?

The contaminants EPA monitoring detected in Baltimore include Nitrate, Fluoride, Barium, TTHM, Chloroform. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.