Kitt Peak National Observatory
On record since 2008: 5 violations. 1 over the limit · 1 missed or late test · 3 notices or reports. Most recent began 2024-11-16.
For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.
More violations on record than 27% of active water systems in Arizona. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.
The record, year by year
Across Arizona, 65% of violations are missed or late tests and 5% are water over a limit.
Lead & copper at the tap
Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.
Lead, 90th percentile 25 results on file · action level 15 ppb
Every violation on record
- 2024-11-16Lead service line inventoryRPTBack in compliance
- 2024-01-01Revised Total Coliform RuleRPTBack in compliance
- 2021-10-01Revised Total Coliform RuleRPTBack in compliance
- 2017-03-01ChloriteMCL, Averagemeasured 1.10 MG/LBack in compliance
- 2008-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
System details
| Population served | 247 |
| Service connections | 41 |
| Water source | Surface Water |
| System type | Non-Transient Non-Community |
| Owner | Federal |
| Status | Active |
| City | Tucson |
| EPA ZIP on file | 85719 |
Areas served
Reading this record
Kitt Peak National Observatory is a non-transient non-community that draws from surface water and serves about 247 people in Tucson, Arizona. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.
Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.
Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.