Public water system record
Usfs KNF Tusayan Admin
Serves Tusayan and Williams, Coconino County, AZ · 80 people served
Federal records show 4 health-based violations and 30 monitoring/reporting issues for Usfs KNF Tusayan Admin in the last ten years. The most serious issue in this window was a resolved Revised Total Coliform Rule violation.
System profile
- Health-based violations, last 10 years
- 4
- Resolved
- 4
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 30
Key facts
- Usfs KNF Tusayan Admin buys its water from Grand Canyon National Park.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.113 mg/L, federal limit 0.08 mg/L (1.4 times the limit), 2020.
- Most recent formal enforcement: signed compliance agreement by Arizona, June 1994.
- Record on file since 1984, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 32 unknown out of 32 service lines.
Check whether Usfs KNF Tusayan Admin 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 |
|---|---|---|---|---|
|
Revised Total Coliform Rule
Treatment technique failure
|
110 | Oct 24, 2022 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jun 29, 2022 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.102 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
|
220 | Jul 1, 2020 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.113 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
|
220 | Apr 1, 2020 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Nov 2, 2025 | Resolved |
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Jul 2, 2025 | Active |
|
Public Notice
OTHER
|
Jan 2, 2025 | Resolved |
|
Public Notice
OTHER
|
Nov 13, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2024 | Resolved |
|
Public Notice
OTHER
|
Apr 2, 2024 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2024 | Active |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Mar 1, 2023 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Jul 1, 2022 | Resolved |
|
Public Notice
OTHER
|
May 26, 2022 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Jan 1, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 2, 2021 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Mar 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2020 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2020 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Aug 1, 2020 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Aug 1, 2020 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2019 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Nov 3, 2017 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2017 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
Full record since 1984
EPA's records for Usfs KNF Tusayan Admin go back to 1984. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 86 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 1 |
| 1990s | 1 | 2 |
| 2000s | 0 | 39 |
| 2010 to October 18, 2016 | 0 | 44 |
| October 19, 2016 to 2019 | 0 | 6 |
| 2020s | 4 | 23 |
Most recent health-based violation before October 19, 2016: Surface Water Treatment Rule, began January 1992, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Treatment technique failure
|
Jan 1, 1992 | Resolved |
Enforcement actions
Arizona regulators took 1 formal enforcement action against Usfs KNF Tusayan Admin in 1994. The most recent was a signed compliance agreement in June 1994.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jun 1, 1994 | Arizona | Signed compliance agreement | 1 violation (1 health-based): Surface Water Treatment Rule |
What the violations mean
Total Trihalomethanes (TTHMs)
2 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Revised Total Coliform Rule
1 incidentThe system did not meet a requirement of the Revised Total Coliform Rule
Coliform and E. coli rules protect against bacteria in the distribution system
Groundwater Rule
1 incidentThe 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 this violation.
Where the water comes from
Usfs KNF Tusayan Admin buys its water from Grand Canyon National Park. It lists no wells or intakes of its own.
Buys water from
- Grand Canyon National Park Grand Canyon, AZ
Annual water quality report
Usfs KNF Tusayan Admin 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 Usfs KNF Tusayan Admin 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 Arizona.
Certified drinking water labs by state EPA guidance for private wells