Water report · not indexed
What is in the water at 80108
4 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
CASTLE PINES VILLAGE MD
PWSID CO0118005 · CO · serves 5,656 people
PFAS and lithium
1 compound detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 4 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 31 µg/L | 4 | 8/8/2023 |
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
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.
CASTLE PINES NORTH MD
PWSID CO0118006 · CO · serves 12,800 people
PFAS and lithium
5 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 11 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 24 µg/L | 3 | 12/4/2025 |
| PFBA | 0.0064 µg/L | 2 | 12/4/2025 |
| PFPeA | 0.0038 µg/L | 2 | 12/4/2025 |
| PFBS | 0.0033 µg/L | 2 | 12/4/2025 |
| PFHxA | 0.0032 µg/L | 2 | 12/4/2025 |
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
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.
CASTLE ROCK TOWN OF
PWSID CO0118010 · CO · serves 106,822 people
PFAS and lithium
3 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 14 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 25 µg/L | 11 | 8/28/2023 |
| PFBA | 0.0051 µg/L | 1 | 8/28/2023 |
| PFPeA | 0.0047 µg/L | 2 | 8/28/2023 |
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 200 mg/L as CaCO₃, measured at 3 stations serving this system across 26 results, 2015-02-05 to 2025-05-05. Measured in the water source and distribution area, not at a tap, and not in your home.
PARKER WSD
PWSID CO0118040 · CO · serves 75,949 people
PFAS and lithium
6 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 54 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 28 µg/L | 26 | 9/4/2024 |
| PFPeA | 0.014 µg/L | 8 | 7/1/2025 |
| PFHxA | 0.012 µg/L | 8 | 7/1/2025 |
| PFBA | 0.0086 µg/L | 5 | 7/1/2025 |
| PFOA | 0.0048 µg/L | 2 | 4/2/2025 |
| PFBS | 0.0046 µg/L | 5 | 7/1/2025 |
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
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.