Tap WaterIndex

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Tap water quality report

Dallas

EPA monitoring tested this supplier for 5 contaminants and detected 4. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

5
contaminants tested
4
detected
89
people served
0
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
GWP
Ownership
Local government
Counties served
Gregory

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

0
health-based violations
12
violations on file
0
still open
ViolationTypeStatusPeriod
Other Monitoring Resolved 2003-07-01
Other Monitoring Resolved 2003-07-01
MR Monitoring Archived 1999-07-01 → 1999-07-31
MR Monitoring Archived 1999-07-01 → 1999-07-31
MR Monitoring Archived 1995-08-01 → 1995-08-31
MR Monitoring Archived 1995-08-01 → 1995-08-31
MR Monitoring Resolved 1994-01-01 → 1994-11-29
MR Monitoring Resolved 1994-01-01 → 1994-11-29
MR Monitoring Archived 1991-05-01 → 1991-05-31
MR Monitoring Archived 1991-05-01 → 1991-05-31

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2023
Copper
211 µg/L 16%
of the EPA limit 1300 µg/L
worst single sample: 220 µg/L
10/10 SYR4 2014–2017
Lead
1.91 µg/L 13%
of the EPA limit 15 µg/L
worst single sample: 2 µg/L
10/10 SYR4 2014–2017
TTHM
8.771 µg/L 11%
of the EPA limit 80 µg/L
worst single sample: 9.24 µg/L
3/3 SYR4 2013–2017
1 contaminants tested, none detected
Total Haloacetic Acids (HAA5)

Utility contact

Contact
LEROY MILLER
Phone
6058302949
Email
[email protected]

Frequently asked questions about Dallas

Is Dallas tap water safe to drink?

EPA monitoring detected 4 contaminants in Dallas's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Dallas's water?

EPA monitoring detected Lead, Copper, Lead, TTHM. The full list with the level and data source for each is above.

How many people does Dallas serve?

Dallas reports serving 89 people in South Dakota, per its EPA record.

Has Dallas had any water quality violations?

The EPA has 12 violations on file for Dallas, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.