- EPA's UCMR 5 testing looked for 30 contaminants here and found 7.
- Lithium: found in 4 of 4 samples, average 19.2 µg/L, highest 23.2 µg/L (EPA UCMR 5 testing, Jul 2023–Aug 2024)
- PFOA (a PFAS): found in 1 of 4 samples, average 1.4 ppt, highest 5.6 ppt (EPA UCMR 5 testing, Jul 2023–Aug 2024)
- PFOS (a PFAS): found in 1 of 4 samples, average 1.3 ppt, highest 5.1 ppt (EPA UCMR 5 testing, Jul 2023–Aug 2024)
- PFBS (a PFAS): found in 1 of 4 samples, average 1 ppt, highest 3.9 ppt (EPA UCMR 5 testing, Jul 2023–Aug 2024)
- PFHxA (a PFAS): found in 1 of 4 samples, average 0.90 ppt, highest 3.8 ppt (EPA UCMR 5 testing, Jul 2023–Aug 2024)
- PFPeA (a PFAS): found in 1 of 4 samples, average 0.90 ppt, highest 3.7 ppt (EPA UCMR 5 testing, Jul 2023–Aug 2024)
- PFHpA (a PFAS): found in 1 of 4 samples, average 0.80 ppt, highest 3.1 ppt (EPA UCMR 5 testing, Jul 2023–Aug 2024)
- Lead, 90th percentile: 2 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2026–Jun 30, 2026). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
Public EPA test results
Can you drink Stonegate tap water? What EPA records show
EPA CO0118076 · serves Douglas County, CO · about 15,295 people (EPA SDWIS)
This report shows EPA's federal records for this water system: UCMR 5 testing, lead testing and violations. It isn't a test of the water at your tap, and it has no Water Score.
Public EPA test results
Stonegate MD (EPA CO0118076)
ScoreYourWater.com gives no verdict on your tap water; it shows what the public records say, as of October 14, 2026. For Stonegate's main utility, Stonegate MD: We found no health-based violations in EPA's records for this system (CO0118076) since July 1, 2021, as of October 14, 2026. EPA's UCMR 5 testing looked for 30 contaminants here and found 7.
What EPA records show for Stonegate MD, as of October 14, 2026
We found no health-based violations in EPA's records for this system (CO0118076) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Stonegate MD (SDWIS). Data as of October 14, 2026.
Lead, 90th percentile: 2 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2026–Jun 30, 2026). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 7.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does Stonegate MD use chloramine?
EPA treatment records (state-reported) list chloramines for Stonegate MD. EPA record