No open health-based violations on EPA record in the last 10 years.
Serves about 8,770 people (3,725 connections) with surface water from its own intake.
From EPA's record for CO0142200. PurityMap is independent of City of Cortez.
Are you this utility? Correct this listing →
1 health-based violation in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From January 2020 | Interim Enhanced Surface Water Treatment Rule | – | – | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from January 2023 to April 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 25 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2023-01-10 to 2023-10-09 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-10 to 2023-10-09 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-10 to 2023-10-09 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-10 to 2023-10-09 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-01-10 to 2023-10-09 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-06 to 2024-04-23 | UCMR5 Analytical Results: CORTEZ CITY OF (CO0142200) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure
Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Get PurityMap updates about this water system.
Follow this water →City of Cortez's phone number on EPA record is 970-565-7320. Its mailing address is 110 W PROGRESS CR, CORTEZ, CO 81321.
According to EPA's record, City of Cortez uses surface water from its own intake.
EPA's record shows 1 health-based violation for City of Cortez in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in City of Cortez's latest lead and copper round, which ended in December 2025, was 2.2 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for City of Cortez. Its phone number on EPA record is 970-565-7320. Its mailing address on EPA record is 110 W PROGRESS CR, CORTEZ, CO 81321. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.