Public water system record
City of Hooper Bay
Serves Hooper Bay, Kusilvak Census Area, AK · 1,200 people served
Federal records show 6 health-based violations and 122 monitoring/reporting issues for City of Hooper Bay in the last ten years. The most serious issue in this window was a Total Trihalomethanes (TTHMs) violation that EPA lists as archived, not resolved.
System profile
Source water
Groundwater
ZIP
99604
EPA system ID
AK2270312
- Health-based violations, last 10 years
- 6
- Resolved
- 5
- Unresolved
- 0
- Archived by EPA
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 122
Key facts
- City of Hooper Bay draws water from 6 wells.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.101 mg/L, federal limit 0.08 mg/L (1.3 times the limit), 2025.
- Most recent enforcement action: boil water order by Alaska, August 2025.
- Record on file since 1985, with 6 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 196 service lines.
Check whether City of Hooper Bay serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.101 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
|
220 | Oct 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Mar 8, 2024 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Mar 8, 2024 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jan 22, 2021 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jan 22, 2021 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Chlorine
Monitoring and reporting
|
Dec 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Oct 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Oct 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Chlorine
Monitoring and reporting
|
Aug 1, 2025 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Aug 1, 2025 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jun 1, 2025 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jun 1, 2025 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2025 | Active |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2024 | Resolved |
|
Chlorine
Monitoring and reporting
|
Dec 1, 2024 | Resolved |
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Oct 17, 2024 | Resolved |
|
Public Notice
OTHER
|
Aug 21, 2024 | Resolved |
|
Public Notice
OTHER
|
Aug 21, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Feb 1, 2024 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Groundwater Rule
OTHER
|
Dec 9, 2023 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2023 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2023 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2023 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Mar 1, 2023 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2022 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2022 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2022 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Feb 1, 2022 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Aug 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2021 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jul 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
May 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Apr 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Feb 1, 2021 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jan 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2020 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2020 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2020 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Aug 1, 2020 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2020 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
May 1, 2020 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Mar 1, 2020 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2019 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2019 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2019 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2019 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Feb 1, 2019 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jan 1, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2018 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2018 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Revised Total Coliform Rule
Monitoring violation
|
Jul 1, 2018 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Mar 1, 2018 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Feb 1, 2018 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jan 1, 2018 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2017 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jul 1, 2017 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Jan 1, 2017 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Jan 1, 2017 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Combined Uranium
Monitoring and reporting
|
Jan 1, 2017 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Chlorine
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
HEXACHLOROBENZENE
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Endrin
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
BHC-GAMMA
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Methoxychlor
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Toxaphene
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Dalapon
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Glyphosate
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Di(2-ethylhexyl) adipate
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
OXAMYL
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Simazine
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Di(2-ethylhexyl) phthalate
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Picloram
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Dinoseb
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Hexachlorocyclopentadiene
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Carbofuran
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Atrazine
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
LASSO
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
2,3,7,8-TCDD
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Heptachlor
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Heptachlor epoxide
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
2,4-D
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
2,4,5-TP
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Benzo(a)pyrene
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Pentachlorophenol
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Total Polychlorinated Biphenyls (PCB)
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
1,2-DIBROMO-3-CHLOROPROPANE
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
ETHYLENE DIBROMIDE
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Chlordane
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
E. coli
Monitoring and reporting
|
Jul 19, 2016 | Resolved |
|
Revised Total Coliform Rule
OTHER
|
Apr 1, 2016 | Resolved |
|
Ground Water Rule
OTHER
|
Mar 10, 2016 | Active |
|
Ground Water Rule
OTHER
|
Sep 25, 2012 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2004 | Active |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2003 | Active |
Full record since 1985
EPA's records for City of Hooper Bay go back to 1985. Before October 19, 2016 they list 6 health-based violations (6 resolved) and 352 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 9 |
| 1990s | 0 | 36 |
| 2000s | 0 | 43 |
| 2010 to October 18, 2016 | 6 | 264 |
| October 19, 2016 to 2019 | 0 | 24 |
| 2020s | 6 | 63 |
Most recent health-based violation before October 19, 2016: Arsenic, began April 2012, Resolved.
Show all 6 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.014 mg/L, federal limit 0.01 mg/L (1.4 times the limit)
|
Apr 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Jan 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Oct 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Jul 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Apr 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Jan 1, 2011 | Resolved |
Enforcement actions
Alaska regulators issued 3 boil water orders to City of Hooper Bay between 2011 and 2025. The most recent was a boil water order in August 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Aug 8, 2025 | Alaska | Boil water order | 1 violation |
| Dec 9, 2024 | Alaska | Boil water order | 1 violation |
| Nov 8, 2011 | Alaska | Boil water order | 1 violation |
What the violations mean
Groundwater Rule
4 incidentsThe system did not complete a treatment step or action that the Groundwater Rule requires (a treatment technique violation).
The utility had to notify customers about each of these violations.
Total Trihalomethanes (TTHMs)
1 incidentDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
LEAD AND COPPER RULE REVISIONS
1 incidentThe system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).
The utility had to notify customers about this violation.
Where the water comes from
City of Hooper Bay draws water from 6 wells.
Annual water quality report
City of Hooper Bay must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Alaska.
Certified drinking water labs by state EPA guidance for private wells