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Tap water quality report

Tyonek Water

EPA monitoring tested this supplier for 45 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

45
contaminants tested
15
detected
206
people served
60
health-based violations
Alaska rankingsLead in AlaskaPFAS in Alaska
Water source
Ground water
Ownership
Native American
Counties served
Kenai Peninsula Borough

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.

60
health-based violations
609
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2007-04-01 → 2007-06-30
TT Health-based Resolved 2005-11-01 → 2005-11-30
TT Health-based Resolved 2005-11-01 → 2005-11-30
TT Health-based Resolved 2005-11-01 → 2005-11-30
TT Health-based Resolved 2005-08-01 → 2005-08-31
TT Health-based Resolved 2005-08-01 → 2005-08-31
TT Health-based Resolved 2005-07-01 → 2005-07-31
TT Health-based Resolved 2005-07-01 → 2005-07-31
MCL Health-based Resolved 2005-06-01 → 2005-06-30
TT Health-based Resolved 2005-06-01 → 2005-06-30

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
1055 µg/L 81%
of the EPA limit 1300 µg/L
worst single sample: 1300 µg/L
30/30 SYR4 2016–2018
Lead
13.525 µg/L 90%
of the EPA limit 15 µg/L
worst single sample: 21 µg/L
26/30 SYR4 2016–2018
Lead
0.0049 mg/L 33%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2025
Bromodichloromethane
2.893 µg/L
No EPA limit set
worst single sample: 2.9 µg/L
8/8 SYR4 2012–2019
Chloroform
20.455 µg/L
No EPA limit set
worst single sample: 20.7 µg/L
8/8 SYR4 2012–2019
Dichloroacetic Acid
6.3495 µg/L
No EPA limit set
worst single sample: 6.43 µg/L
8/8 SYR4 2012–2019
TTHM
23.325 µg/L 29%
of the EPA limit 80 µg/L
worst single sample: 23.5 µg/L
8/8 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
17.44 µg/L 29%
of the EPA limit 60 µg/L
worst single sample: 18 µg/L
8/8 SYR4 2012–2019
Trichloroacetic Acid
10.86 µg/L
No EPA limit set
worst single sample: 11 µg/L
8/8 SYR4 2012–2019
Arsenic
0.6171 µg/L 6.2%
of the EPA limit 10 µg/L
worst single sample: 0.6210 µg/L
3/6 SYR4 2012–2017
Barium
14.4 µg/L 0.7%
of the EPA limit 2000 µg/L
 1/1 SYR4 2012
Chromium
0.6140 µg/L 0.6%
of the EPA limit 100 µg/L
 1/1 SYR4 2012
Combined Radium (-226 And -228)
0.7900 pCi/L 16%
of the EPA limit 5 pCi/L
 1/1 SYR4 2013
Fluoride
180 µg/L 4.5%
of the EPA limit 4000 µg/L
 1/1 SYR4 2012
Xylenes, Total
0.7000 µg/L 0%
of the EPA limit 10000 µg/L
 1/3 SYR4 2012–2019
30 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneBenzeneBromoformChlorobenzeneCadmiumCarbon TetrachlorideDichloromethaneDibromoacetic AcidDibromochloromethaneEthylbenzeneMercuryMonobromoacetic AcidMonochloroacetic AcidNitrateNitrate-NitriteSeleniumStyreneTetrachloroethyleneTolueneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
STANDIFER, CRYSTAL
Phone
907-583-2201
Email
[email protected]

Frequently asked questions about Tyonek Water

Is Tyonek Water tap water safe to drink?

EPA monitoring detected 15 contaminants in Tyonek 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 Tyonek Water's water?

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

How many people does Tyonek Water serve?

Tyonek Water reports serving 206 people in Alaska, per its EPA record.

Has Tyonek Water had any water quality violations?

The EPA has 609 violations on file for Tyonek Water, of which 60 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.