Tap WaterIndex

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Tap water quality report

Woonsocket

EPA monitoring tested this supplier for 21 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

21
contaminants tested
12
detected
618
people served
13
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Ground water
Ownership
Local government
Counties served
Sanborn

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.

13
health-based violations
141
violations on file
2
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2014-02-01
TT Health-based Resolved 2014-02-01
MCL Health-based Resolved 2013-08-01 → 2013-08-31
MCL Health-based Resolved 2013-08-01 → 2013-08-31
MCL Health-based Resolved 2013-08-01 → 2013-08-31
TT Health-based Resolved 2011-10-04 → 2012-07-19
TT Health-based Resolved 2011-10-04 → 2012-07-19
TT Health-based Resolved 2010-04-26 → 2010-06-24
TT Health-based Resolved 2010-04-26 → 2010-06-24
TT Health-based Resolved 2010-04-01

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
Copper
100.5 µg/L 7.7%
of the EPA limit 1300 µg/L
worst single sample: 160 µg/L
40/40 SYR4 2012–2018
Lead
8.32 µg/L 55%
of the EPA limit 15 µg/L
worst single sample: 9.7 µg/L
40/40 SYR4 2012–2018
Lead
0.0130 mg/L 87%
of the EPA limit 0.0150 mg/L
 18/18 LCR 2025
Nitrate
1800 µg/L 18%
of the EPA limit 10000 µg/L
 4/12 SYR4 2017–2019
Barium
10.68 µg/L 0.5%
of the EPA limit 2000 µg/L
worst single sample: 10.7 µg/L
2/2 SYR4 2018
Chromium
1.662 µg/L 1.7%
of the EPA limit 100 µg/L
worst single sample: 1.7 µg/L
2/2 SYR4 2018
Fluoride
700 µg/L 18%
of the EPA limit 4000 µg/L
 2/2 SYR4 2015
Gross Alpha, Excl. Radon And U
5.16 pCi/L 34%
of the EPA limit 15 pCi/L
worst single sample: 5.2 pCi/L
2/2 SYR4 2015
Nitrite
753.5 µg/L 75%
of the EPA limit 1000 µg/L
worst single sample: 790 µg/L
2/2 SYR4 2019
Selenium
1.19 µg/L 2.4%
of the EPA limit 50 µg/L
worst single sample: 1.2 µg/L
2/2 SYR4 2018
Total Haloacetic Acids (HAA5)
1.068 µg/L 1.8%
of the EPA limit 60 µg/L
worst single sample: 1.07 µg/L
2/9 SYR4 2012–2019
TTHM
0.5200 µg/L 0.7%
of the EPA limit 80 µg/L
 1/9 SYR4 2012–2019
9 contaminants tested, none detected
Antimony, TotalArsenicBeryllium, TotalCadmiumCombined Radium (-226 And -228)Combined UraniumGross Beta Particle ActivityMercuryThallium, Total

Utility contact

Contact
RICHARD JENSEN
Phone
6057964275
Email
[email protected]

Frequently asked questions about Woonsocket

Is Woonsocket tap water safe to drink?

EPA monitoring detected 12 contaminants in Woonsocket'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 Woonsocket's water?

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

How many people does Woonsocket serve?

Woonsocket reports serving 618 people in South Dakota, per its EPA record.

Has Woonsocket had any water quality violations?

The EPA has 141 violations on file for Woonsocket, of which 13 are health-based (a contaminant limit or required treatment was breached) and 2 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.