Public water system record
Grand Canyon National Park
Serves Grand Canyon Village, Coconino County, AZ · 16,590 people served
Federal records show 6 health-based violations and 67 monitoring/reporting issues for Grand Canyon National Park in the last ten years. The most serious issue in this window was a resolved LEAD AND COPPER RULE REVISIONS violation.
System profile
- Health-based violations, last 10 years
- 6
- Resolved
- 6
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 67
Key facts
- Grand Canyon National Park draws water from 1 spring.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit), 2024.
- Most recent formal enforcement: compliance order (no penalty) by Arizona, September 1995.
- Record on file since 1992, with 5 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 1,458 unknown out of 1,458 service lines.
Check whether Grand Canyon National Park 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 |
|---|---|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 | 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 | Apr 1, 2024 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jul 1, 2022 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jun 1, 2022 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Mar 1, 2022 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Dec 1, 2021 | 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 19, 2025 | Active |
|
Public Notice
OTHER
|
Sep 2, 2025 | Active |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2025 | Resolved |
|
Styrene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Toluene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Benzene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Xylenes, Total
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Oct 17, 2024 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Oct 1, 2024 | Resolved |
|
Chlorine
Monitoring and reporting
|
Aug 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Aug 1, 2024 | Resolved |
|
Public Notice
OTHER
|
Jul 2, 2024 | Resolved |
|
Public Notice
OTHER
|
Jul 2, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2023 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Apr 1, 2023 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Apr 1, 2023 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2022 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2019 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jun 1, 2019 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jun 1, 2019 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Feb 1, 2019 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Feb 1, 2017 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2016 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Radium-228
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
Radium-226
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
Selenium
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
Thallium, Total
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
Beryllium, Total
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
Antimony, Total
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
Nickel
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
Mercury
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
Fluoride
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
Chromium (total)
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
Cadmium
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
Barium
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2009 | Resolved |
Full record since 1992
EPA's records for Grand Canyon National Park go back to 1992. Before October 19, 2016 they list 5 health-based violations (5 resolved) and 216 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 48 |
| 2000s | 3 | 152 |
| 2010 to October 18, 2016 | 1 | 16 |
| October 19, 2016 to 2019 | 0 | 7 |
| 2020s | 6 | 42 |
Most recent health-based violation before October 19, 2016: Total Coliform, began January 2010, Resolved.
Show all 5 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jan 1, 2010 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jan 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2002 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jan 1, 1992 | Resolved |
Enforcement actions
Arizona regulators took 1 formal enforcement action against Grand Canyon National Park in 1995. The most recent was a compliance order (no penalty) in September 1995.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Sep 1, 1995 | Arizona | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
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.
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.
Total Trihalomethanes (TTHMs)
1 incidentDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Where the water comes from
Grand Canyon National Park draws water from 1 spring. 1 other community water system buys water from Grand Canyon National Park.
Community systems that buy water from it
- Usfs KNF Tusayan Admin Flagstaff, AZ
Annual water quality report
Grand Canyon National Park 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 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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