Public water system record
McGrath Water System
Serves McGrath, Yukon-Koyukuk Census Area, AK · 341 people served
Federal records show 23 health-based violations and 47 monitoring/reporting issues for McGrath Water System in the last ten years. The most serious issue in this window was a Haloacetic Acids (HAA5) violation that EPA lists as archived, not resolved.
System profile
Source water
Surface water
ZIP
99627
EPA system ID
AK2280155
- Health-based violations, last 10 years
- 23
- Resolved
- 22
- Unresolved
- 0
- Archived by EPA
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 47
Key facts
- McGrath Water System draws water from 1 surface water intake.
- Highest measured level in the last 10 years: Haloacetic Acids (HAA5), 0.099 mg/L, federal limit 0.06 mg/L (1.7 times the limit), 2020.
- Most recent enforcement action: boil water order by Alaska, October 2025.
- Record on file since 1985, with 31 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 203 service lines.
Check whether McGrath Water System 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 |
|---|---|---|---|---|
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
220 | Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jul 1, 2024 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Apr 1, 2024 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jan 1, 2024 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Jul 1, 2023 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jul 1, 2021 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Apr 1, 2021 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jan 1, 2021 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.061 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
220 | Oct 1, 2020 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.099 mg/L, federal limit 0.06 mg/L (1.7 times the limit)
|
220 | Jul 1, 2020 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jul 1, 2020 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.097 mg/L, federal limit 0.06 mg/L (1.6 times the limit)
|
220 | Apr 1, 2020 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Apr 1, 2020 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.098 mg/L, federal limit 0.06 mg/L (1.6 times the limit)
|
220 | Jan 1, 2020 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jan 1, 2020 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.09 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
|
220 | Oct 1, 2019 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Oct 1, 2019 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.07 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
220 | Jan 1, 2018 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jan 1, 2018 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.07 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
220 | Oct 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Oct 1, 2017 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.06 mg/L (1.4 times the limit)
|
220 | Jul 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Jul 1, 2017 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jul 1, 2025 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jul 1, 2025 | Resolved |
|
Public Notice
OTHER
|
Dec 28, 2024 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Dec 1, 2024 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Dec 1, 2024 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2024 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2023 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2023 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Feb 14, 2023 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Feb 14, 2023 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2022 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jul 1, 2022 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jul 1, 2022 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2022 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2022 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Apr 1, 2022 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2022 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Feb 1, 2022 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2021 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Nov 1, 2021 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Nov 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2021 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Aug 1, 2021 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Aug 1, 2021 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Aug 1, 2021 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Jul 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jul 1, 2021 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Apr 1, 2021 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Apr 1, 2020 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Dec 1, 2018 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2018 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Nov 1, 2017 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Nov 1, 2017 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Dec 1, 2016 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Nov 1, 2016 | Resolved |
Full record since 1985
EPA's records for McGrath Water System go back to 1985. Before October 19, 2016 they list 31 health-based violations (18 resolved, 13 archived by EPA without a recorded fix) and 241 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 23 |
| 1990s | 8 | 74 |
| 2000s | 19 | 137 |
| 2010 to October 18, 2016 | 4 | 7 |
| October 19, 2016 to 2019 | 8 | 11 |
| 2020s | 15 | 36 |
Most recent health-based violation before October 19, 2016: Haloacetic Acids (HAA5), began January 2013, Resolved.
Show all 31 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.072 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Jan 1, 2013 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
Oct 1, 2012 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.072 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Oct 1, 2012 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.061 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
Jul 1, 2012 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.107 mg/L, federal limit 0.06 mg/L (1.8 times the limit)
|
Jan 1, 2009 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
Oct 1, 2008 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.076 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
|
Oct 1, 2008 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.09 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
|
Jul 1, 2008 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Jul 1, 2008 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
|
Apr 1, 2008 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.117 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
|
Apr 1, 2008 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.069 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Jan 1, 2008 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.08 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
|
Oct 1, 2007 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Oct 1, 2007 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Jul 1, 2007 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.06 mg/L (1.4 times the limit)
|
Apr 1, 2007 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.099 mg/L, federal limit 0.06 mg/L (1.7 times the limit)
|
Jan 1, 2006 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jun 1, 2004 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Oct 1, 2000 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Sep 1, 2000 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Aug 1, 2000 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 2000 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jun 1, 2000 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Aug 1, 1999 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 1999 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jun 1, 1999 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
May 1, 1999 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
May 1, 1998 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Mar 1, 1998 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Dec 1, 1997 | Archived |
|
Cadmium
Contaminant limit exceeded
|
Aug 31, 1993 | Resolved |
Enforcement actions
Alaska regulators issued 6 boil water orders to McGrath Water System between 2017 and 2025. The most recent was a boil water order in October 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Oct 24, 2025 | Alaska | Boil water order | 1 violation |
| Apr 20, 2023 | Alaska | Boil water order | 1 violation |
| May 19, 2021 | Alaska | Boil water order | 1 violation |
| Sep 5, 2019 | Alaska | Boil water order | 1 violation |
| Jun 24, 2018 | Alaska | Boil water order | 1 violation |
| Oct 8, 2017 | Alaska | Boil water order | 1 violation |
What the violations mean
Haloacetic Acids (HAA5)
9 incidentsHaloacetic acid byproducts exceeded the federal limit
Long-term exposure to HAAs may increase cancer risk
Total Trihalomethanes (TTHMs)
8 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
CARBON, TOTAL
6 incidentsThe system did not complete a treatment step or action that federal rules require for CARBON, TOTAL (a treatment technique violation).
The utility had to notify customers about each of these violations.
Where the water comes from
McGrath Water System draws water from 1 surface water intake.
Annual water quality report
McGrath Water System 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.
Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask McGrath Water System for a copy.
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