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Tap water quality report

Dallas, TX

EPA monitoring detected 38 contaminants across the 7 water suppliers serving Dallas. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

7
water suppliers
1,395,327
people served
38
contaminants found
Texas rankings Lead in Texas PFAS in Texas

What was found in Dallas's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
10700 µg/L 107%
of the EPA limit, in the worst sample — 10000 µg/L
 3/7 SYR4
Fluoride
3270 µg/L 82%
of the EPA limit 4000 µg/L
 3/7 SYR4
Copper
1150 µg/L 88%
of the EPA limit 1300 µg/L
 6/7 SYR4
Cyanide
164 µg/L 82%
of the EPA limit 200 µg/L
 2/7 SYR4
TTHM
74.2 µg/L 93%
of the EPA limit 80 µg/L
 6/7 SYR4
Barium
65 µg/L 3.3%
of the EPA limit 2000 µg/L
 3/7 SYR4
Bromoform
57 µg/L
No EPA limit set
 6/7 SYR4
Lead
52.1 µg/L 347%
of the EPA limit, in the worst sample — 15 µg/L
 5/7 SYR4
Chloroform
46.8 µg/L
No EPA limit set
 6/7 SYR4
Total Haloacetic Acids (HAA5)
40.8 µg/L 68%
of the EPA limit 60 µg/L
 6/7 SYR4
Monochloroacetic Acid
35.4 µg/L
No EPA limit set
 6/7 SYR4
Dibromochloromethane
32.1 µg/L
No EPA limit set
 6/7 SYR4
Nitrite
31.5 µg/L 3.2%
of the EPA limit 1000 µg/L
 1/7 SYR4
Dichloroacetic Acid
26.8 µg/L
No EPA limit set
 6/7 SYR4
Bromodichloromethane
26.2 µg/L
No EPA limit set
 6/7 SYR4
Dibromoacetic Acid
13.2 µg/L
No EPA limit set
 5/7 SYR4
Bromate
13 µg/L 130%
of the EPA limit, in the worst sample — 10 µg/L
 1/7 SYR4
Chromium
8.5 µg/L 8.5%
of the EPA limit 100 µg/L
 3/7 SYR4
Gross Beta Particle Activity
6.6 pCi/L
No EPA limit set
 2/7 SYR4
Monobromoacetic Acid
5.4 µg/L
No EPA limit set
 6/7 SYR4
Trichloroacetic Acid
4.6 µg/L
No EPA limit set
 6/7 SYR4
Selenium
4.08 µg/L 8.2%
of the EPA limit 50 µg/L
 3/7 SYR4
Di(2-ethylhexyl) Phthalate
2.7 µg/L 45%
of the EPA limit 6 µg/L
 1/7 SYR4
Arsenic
2.09 µg/L 21%
of the EPA limit 10 µg/L
 2/7 SYR4
Combined Radium (-226 And -228)
1 pCi/L 20%
of the EPA limit 5 pCi/L
 1/7 SYR4
Atrazine
0.3700 µg/L 12%
of the EPA limit 3 µg/L
 2/7 SYR4
Simazine
0.3700 µg/L 9.3%
of the EPA limit 4 µg/L
 2/7 SYR4
Antimony, Total
0.3200 µg/L 5.3%
of the EPA limit 6 µg/L
 2/7 SYR4
Heptachlor Epoxide
0.0300 µg/L 15%
of the EPA limit 0.2000 µg/L
 1/7 SYR4
Pfpea
0.0182 µg/L
No EPA limit set
 4/7 UCMR-5
Pfhxa
0.0179 µg/L
No EPA limit set
 4/7 UCMR-5
Pfba
0.0138 µg/L
No EPA limit set
 4/7 UCMR-5
PFBS
0.0089 µg/L
No EPA limit set
 4/7 UCMR-5
PFOA
0.0063 µg/L
No EPA limit set
 3/7 UCMR-5
Pfhpa
0.0060 µg/L
No EPA limit set
 3/7 UCMR-5
PFOS
0.0051 µg/L
No EPA limit set
 3/7 UCMR-5
PFHXS
0.0047 µg/L
No EPA limit set
 4/7 UCMR-5
Lead
0.0034 mg/L 23%
of the EPA limit 0.0150 mg/L
 6/7 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 single worst sample on record — 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 Dallas

SupplierPopulation served
DALLAS WATER UTILITY 1,356,479
CITY OF UNIVERSITY PARK 25,617
TOWN OF HIGHLAND PARK 8,959
CITY OF COCKRELL HILL 3,855
D BAR B MOBILE HOME RANCH 267
DALLAS COUNTY MUD 4 150
DALLAS COUNTY PARK CITIES MUD 0

Frequently asked questions about Dallas tap water

Is Dallas tap water safe to drink?

EPA testing detected 38 contaminants in the water serving Dallas. 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 Dallas?

7 public water suppliers report drinking-water monitoring for Dallas, Texas to the EPA. Each is listed above with its population served.

What contaminants are in Dallas's water?

The contaminants EPA monitoring detected in Dallas include Nitrate, Fluoride, Copper, Cyanide, TTHM. The full list, with the highest level found 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.