Tap WaterIndex

← Washington

Tap water quality report

Sundance Improvement Association

EPA monitoring tested this supplier for 73 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

73
contaminants tested
16
detected
100
people served
40
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Private
Counties served
Benton

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.

40
health-based violations
118
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2025-01-01 → 2025-12-31
MCL Health-based Resolved 2025-01-01 → 2025-12-31
MCL Health-based Resolved 2025-01-01 → 2025-12-31
MCL Health-based Resolved 2025-01-01 → 2025-12-31
MCL Health-based Resolved 2024-01-01 → 2024-12-31
MCL Health-based Resolved 2024-01-01 → 2024-12-31
MCL Health-based Resolved 2024-01-01 → 2024-12-31
MCL Health-based Resolved 2024-01-01 → 2024-12-31
MCL Health-based Resolved 2023-01-01 → 2023-12-31
MCL Health-based Resolved 2023-01-01 → 2023-12-31

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
Nitrate
12515 µg/L 125%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 12900 µg/L
32/32 SYR4 2013–2019
Lead
0.0043 mg/L 29%
of the EPA limit 0.0150 mg/L
 7/7 LCR 2023
Chloroform
8.106 µg/L
No EPA limit set
worst single sample: 8.34 µg/L
5/5 SYR4 2012–2018
TTHM
31.09 µg/L 39%
of the EPA limit 80 µg/L
worst single sample: 32.29 µg/L
5/5 SYR4 2012–2018
Bromodichloromethane
12.757 µg/L
No EPA limit set
worst single sample: 13.3 µg/L
4/5 SYR4 2012–2018
Bromoform
1.437 µg/L
No EPA limit set
worst single sample: 1.44 µg/L
4/5 SYR4 2012–2018
Dibromoacetic Acid
4.2245 µg/L
No EPA limit set
worst single sample: 4.25 µg/L
4/5 SYR4 2012–2018
Dibromochloromethane
10.0955 µg/L
No EPA limit set
worst single sample: 10.4 µg/L
4/5 SYR4 2012–2018
Dichloroacetic Acid
9.6235 µg/L
No EPA limit set
worst single sample: 9.67 µg/L
4/5 SYR4 2012–2018
Total Haloacetic Acids (HAA5)
18.7355 µg/L 31%
of the EPA limit 60 µg/L
worst single sample: 19.4 µg/L
4/5 SYR4 2012–2018
Trichloroacetic Acid
5.333 µg/L
No EPA limit set
worst single sample: 5.65 µg/L
3/5 SYR4 2012–2018
Arsenic
7.49 µg/L 75%
of the EPA limit 10 µg/L
 1/1 SYR4 2019
Barium
87.1 µg/L 4.4%
of the EPA limit 2000 µg/L
 1/1 SYR4 2019
Copper
20.4 µg/L 1.6%
of the EPA limit 1300 µg/L
 1/1 SYR4 2019
Fluoride
335 µg/L 8.4%
of the EPA limit 4000 µg/L
 1/1 SYR4 2019
Nitrate-Nitrite
7850 µg/L 79%
of the EPA limit 10000 µg/L
 1/1 SYR4 2019
57 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitritePentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Betty Jo Shord

Frequently asked questions about Sundance Improvement Association

Is Sundance Improvement Association tap water safe to drink?

EPA monitoring detected 16 contaminants in Sundance Improvement Association'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 Sundance Improvement Association's water?

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

How many people does Sundance Improvement Association serve?

Sundance Improvement Association reports serving 100 people in Washington, per its EPA record.

Has Sundance Improvement Association had any water quality violations?

The EPA has 118 violations on file for Sundance Improvement Association, of which 40 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.