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Tap water quality report

Chefornak Water

EPA monitoring tested this supplier for 49 contaminants and detected 20. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

49
contaminants tested
20
detected
513
people served
34
health-based violations
Alaska rankingsLead in AlaskaPFAS in Alaska
Water source
Ground water
Ownership
Native American
Counties served
Bethel 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.

34
health-based violations
403
violations on file
3
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-06-01
TT Health-based Resolved 2023-10-13
TT Health-based Resolved 2023-10-13
TT Health-based Resolved 2023-10-13
TT Health-based Resolved 2023-10-13
MCL Health-based Resolved 2012-10-01 → 2012-12-31
MCL Health-based Resolved 2012-10-01 → 2012-12-31
MCL Health-based Resolved 2012-07-01 → 2012-09-30
MCL Health-based Resolved 2012-07-01 → 2012-09-30
MCL Health-based Resolved 2012-04-01 → 2012-06-30

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
85.15 µg/L 6.6%
of the EPA limit 1300 µg/L
worst single sample: 97 µg/L
30/30 SYR4 2016–2018
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 17/17 LCR 2025
Bromodichloromethane
129.15 µg/L
No EPA limit set
worst single sample: 180 µg/L
7/7 SYR4 2012–2014
Chloroform
94.54 µg/L
No EPA limit set
worst single sample: 130 µg/L
7/7 SYR4 2012–2014
Lead
16.87 µg/L 112%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 22 µg/L
7/30 SYR4 2016–2018
TTHM
454.62 µg/L 568%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 636 µg/L
7/7 SYR4 2012–2014
Dibromochloromethane
184.815 µg/L
No EPA limit set
worst single sample: 244 µg/L
6/7 SYR4 2012–2014
Bromoform
66.556 µg/L
No EPA limit set
worst single sample: 82.2 µg/L
5/7 SYR4 2012–2014
Dibromoacetic Acid
9.274 µg/L
No EPA limit set
worst single sample: 9.92 µg/L
5/7 SYR4 2012–2014
Dichloroacetic Acid
15.34 µg/L
No EPA limit set
worst single sample: 15.6 µg/L
5/7 SYR4 2012–2014
Total Haloacetic Acids (HAA5)
68.94 µg/L 115%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 80.2 µg/L
5/7 SYR4 2012–2014
Nitrate
654 µg/L 6.5%
of the EPA limit 10000 µg/L
 4/4 SYR4 2016–2017
Trichloroacetic Acid
52.6355 µg/L
No EPA limit set
worst single sample: 61.4 µg/L
4/7 SYR4 2012–2014
Arsenic
1.99 µg/L 20%
of the EPA limit 10 µg/L
 1/2 SYR4 2013–2015
Barium
121 µg/L 6.1%
of the EPA limit 2000 µg/L
 1/1 SYR4 2018
Chromium
2.03 µg/L 2%
of the EPA limit 100 µg/L
 1/1 SYR4 2018
Combined Radium (-226 And -228)
4.8 pCi/L 96%
of the EPA limit 5 pCi/L
 1/2 SYR4 2014–2017
Fluoride
310 µg/L 7.8%
of the EPA limit 4000 µg/L
 1/1 SYR4 2018
Nitrate-Nitrite
955 µg/L 9.6%
of the EPA limit 10000 µg/L
 1/5 SYR4 2013–2019
Toluene
0.8700 µg/L 0.1%
of the EPA limit 1000 µg/L
 1/3 SYR4 2013–2019
29 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalBenzeneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideDichloromethaneEthylbenzeneMercuryMonobromoacetic AcidMonochloroacetic AcidSeleniumStyreneTetrachloroethyleneThallium, TotalTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MATHEW, LATESHA
Phone
907-867-8147
Email
[email protected]

Frequently asked questions about Chefornak Water

Is Chefornak Water tap water safe to drink?

EPA monitoring detected 20 contaminants in Chefornak 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 Chefornak Water's water?

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

How many people does Chefornak Water serve?

Chefornak Water reports serving 513 people in Alaska, per its EPA record.

Has Chefornak Water had any water quality violations?

The EPA has 403 violations on file for Chefornak Water, of which 34 are health-based (a contaminant limit or required treatment was breached) and 3 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.