Water report · not indexed
What is in the water at 80023
3 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
THORNTON CITY OF
PWSID CO0101150 · CO · serves 226,465 people
PFAS and lithium
9 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 42 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 34 µg/L | 7 | 8/14/2023 |
| PFHxA | 0.013 µg/L | 7 | 8/14/2023 |
| PFPeA | 0.012 µg/L | 7 | 8/14/2023 |
| PFBA | 0.01 µg/L | 6 | 8/14/2023 |
| PFBS | 0.0081 µg/L | 7 | 8/14/2023 |
| PFOA | 0.0071 µg/L | 2 | 5/30/2023 |
| PFHxS | 0.0059 µg/L | 2 | 5/30/2023 |
| PFOS | 0.005 µg/L | 2 | 5/30/2023 |
| PFHpA | 0.0037 µg/L | 2 | 5/30/2023 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
Median hardness 222 mg/L as CaCO₃, measured at 2 stations serving this system across 6 results, 2015-02-06 to 2022-08-23. Measured in the water source and distribution area, not at a tap, and not in your home.
WESTMINSTER CITY OF
PWSID CO0101170 · CO · serves 202,078 people
PFAS and lithium
1 compound detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 8 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 21 µg/L | 8 | 9/10/2024 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
Too few readings to state a hardness. 1 station(s), 1 result(s). Below two stations and five results this page will not state a number: a median of two readings from one creek is not your water.
BROOMFIELD CITY AND COUNTY OF
PWSID CO0107155 · CO · serves 106,153 people
PFAS and lithium
Sampled, nothing detected. Tested for 30 compounds under UCMR 5 with none found at or above its reporting limit. A reporting limit is the lowest concentration the method can measure, so this means “below that” rather than “zero”.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
No hardness measurement. Hardness is measured at environmental monitoring stations, and none fell inside this system’s service area. That is a gap in where monitoring happens, not a finding about the water.
What this report cannot tell you
Every figure describes water at a sampling point: a treatment plant, an entry point to the distribution system, or a monitoring station. None of it describes water arriving at your tap. Plumbing between the two can add lead and copper, and if your home was built before 1986 a test kit tells you something no federal dataset can.
Sources: EPA UCMR 5 occurrence (final release, frozen July 2026) · EPA SDWIS health-based violations · USGS and state monitoring via the Water Quality Portal · EPA Public Water System Service Area Boundaries v3. Compiled 2026-09-01.