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Tap water quality report

Chalkyitsik Village Water

EPA monitoring tested this supplier for 50 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

50
contaminants tested
16
detected
76
people served
320
health-based violations
Alaska rankingsLead in AlaskaPFAS in Alaska
Water source
Surface water
Ownership
Native American
Counties served
Yukon-Koyukuk Census Area

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.

320
health-based violations
1,464
violations on file
2
still open
ViolationTypeStatusPeriod
TT Health-based Archived 2026-01-01 → 2026-01-31
TT Health-based Resolved 2025-06-01 → 2025-06-30
TT Health-based Resolved 2025-05-01 → 2025-05-31
MCL Health-based Resolved 2025-04-01 → 2025-06-30
MCL Health-based Resolved 2025-04-01 → 2025-06-30
MCL Health-based Resolved 2025-01-01 → 2025-03-31
MCL Health-based Resolved 2025-01-01 → 2025-03-31
MCL Health-based Resolved 2025-01-01 → 2025-03-31
MCL Health-based Resolved 2025-01-01 → 2025-03-31
MCL Health-based Resolved 2024-10-01 → 2024-12-31

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
Chloroform
175 µg/L
No EPA limit set
worst single sample: 190 µg/L
31/31 SYR4 2012–2019
Dichloroacetic Acid
60.05 µg/L
No EPA limit set
worst single sample: 140 µg/L
30/30 SYR4 2012–2019
TTHM
179.445 µg/L 224%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 192.9 µg/L
30/31 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
104.75 µg/L 175%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 297.3 µg/L
30/30 SYR4 2012–2019
Bromodichloromethane
3.52 µg/L
No EPA limit set
worst single sample: 4.1 µg/L
29/31 SYR4 2012–2019
Trichloroacetic Acid
48.2 µg/L
No EPA limit set
worst single sample: 150 µg/L
28/30 SYR4 2012–2019
Lead
0.0055 mg/L 37%
of the EPA limit 0.0150 mg/L
 26/26 LCR 2025
Copper
1400 µg/L 108%
of the EPA limit, at the 95th percentile of samples — 1300 µg/L
 25/25 SYR4 2012–2019
Lead
8.68 µg/L 58%
of the EPA limit 15 µg/L
worst single sample: 11 µg/L
25/25 SYR4 2012–2019
Monochloroacetic Acid
6.4 µg/L
No EPA limit set
worst single sample: 7.3 µg/L
7/30 SYR4 2012–2019
Nitrate-Nitrite
244.9 µg/L 2.4%
of the EPA limit 10000 µg/L
worst single sample: 250 µg/L
2/6 SYR4 2012–2019
Arsenic
0.3230 µg/L 3.2%
of the EPA limit 10 µg/L
 1/1 SYR4 2012
Barium
72 µg/L 3.6%
of the EPA limit 2000 µg/L
 1/1 SYR4 2019
Chromium
1.2 µg/L 1.2%
of the EPA limit 100 µg/L
 1/1 SYR4 2019
Combined Radium (-226 And -228)
1.4 pCi/L 28%
of the EPA limit 5 pCi/L
 1/1 SYR4 2016
Dibromochloromethane
0.8000 µg/L
No EPA limit set
 1/31 SYR4 2012–2019
34 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalBenzeneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbon TetrachlorideDichloromethaneDibromoacetic AcidEthylbenzeneFluorideMercuryMonobromoacetic AcidNitrateNitriteSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
NATHANIEL, JAMES
Phone
907-848-8117
Email
[email protected]

Frequently asked questions about Chalkyitsik Village Water

Is Chalkyitsik Village Water tap water safe to drink?

EPA monitoring detected 16 contaminants in Chalkyitsik Village Water'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 Chalkyitsik Village Water's water?

EPA monitoring detected Chloroform, Dichloroacetic Acid, TTHM, Total Haloacetic Acids (HAA5), Bromodichloromethane, and others. The full list with the level and data source for each is above.

How many people does Chalkyitsik Village Water serve?

Chalkyitsik Village Water reports serving 76 people in Alaska, per its EPA record.

Has Chalkyitsik Village Water had any water quality violations?

The EPA has 1464 violations on file for Chalkyitsik Village Water, of which 320 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.