Community Water System · PWS CO0118006
Castle Pines North MD
Operator location Castle Pines, Colorado - 0% of 231 violations are health-based (lower-third health share (≤ 1%)); surface water source; 12,800 served per SDWIS.
- 12,800
- People served (this PWS)
- 231
- EPA violations (this PWS)
- 0
- Health-based (this PWS)
- 4 PFAS
- UCMR5 (this PWS)
Castle Pines North MD standing, high SDWIS violation third
0% of 231 recorded violations are health-based - lower-third health share (≤ 1%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 0% is lower-third health share (≤ 1%). UCMR5: middle-third PFAS panel (≤ 4 compounds). Population rank #3,919 of 29,740 among systems serving 500+.
The verdict
Castle Pines North MD sits in the upper third of the sitemap cohort by violation count (231), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (12,800; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is only 0% - almost all of this trail is monitoring or reporting. UCMR5 detected 4 PFAS compounds (middle-third PFAS panel (≤ 4 compounds)).
- #3,919 of 29,740
- Population · /systems
- #82 of 551
- Population · CO
- 231
- Total EPA violations on record
- 0%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
4 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 4,039
- County
- Douglas
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 214
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 9 | 2021 |
| Combined Radium (-226 and -228) | MR | 7 | 2014 |
| Revised Total Coliform Rule | Other | 7 | 2022 |
| Chlorine | MR | 6 | 2008 |
| Consumer Confidence Rule | Other | 5 | 2021 |
| cis-1,2-Dichloroethylene | MR | 4 | 2005 |
| DICHLOROMETHANE | MR | 4 | 2005 |
| o-Dichlorobenzene | MR | 4 | 2005 |
| p-Dichlorobenzene | MR | 4 | 2005 |
| 1,1-Dichloroethylene | MR | 4 | 2005 |
| trans-1,2-Dichloroethylene | MR | 4 | 2005 |
| 1,2-Dichloroethane | MR | 4 | 2005 |
| Carbon tetrachloride | MR | 4 | 2005 |
| 1,2-Dichloropropane | MR | 4 | 2005 |
| Trichloroethylene | MR | 4 | 2005 |
| Tetrachloroethylene | MR | 4 | 2005 |
| CHLOROBENZENE | MR | 4 | 2005 |
| Public Notice | Other | 4 | 2023 |
| 1,1,1-Trichloroethane | MR | 4 | 2005 |
| Styrene | MR | 4 | 2005 |
| Toluene | MR | 4 | 2005 |
| Xylenes, Total | MR | 4 | 2005 |
| Ethylbenzene | MR | 4 | 2005 |
| Vinyl chloride | MR | 4 | 2005 |
| Benzene | MR | 4 | 2005 |
| 1,2,4-Trichlorobenzene | MR | 4 | 2005 |
| 1,1,2-Trichloroethane | MR | 4 | 2005 |
| TTHM | MR | 3 | 2009 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2009 |
| BHC-GAMMA | MR | 3 | 2014 |
Violation Count vs. the National Corpus
Castle Pines North MD has 231 recorded EPA violations, 87% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 13% carry more. 0% of this system's own violations are health-based (0 of 231), and it ranks #3,919 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
231 Higher than most more violations than 87% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 58 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| 9Cl-PF3ONS | 10/8/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFTrDA | 10/8/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| NMeFOSAA | 10/8/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFBS | 10/8/2025 | 3.30 ppt | 3.00 ppt | Detected |
| PFHpA | 10/8/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 10/8/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 10/8/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 10/8/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 10/8/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDA | 10/8/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 10/8/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 10/8/2025 | 3.20 ppt | 3.00 ppt | Detected |
| PFTA | 10/8/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 10/8/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeS | 10/8/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| ADONA | 10/8/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 10/8/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 10/8/2025 | 6.00 ppt | 5.00 ppt | Detected |
| 6:2 FTS | 10/8/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 10/8/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 10/8/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 10/8/2025 | 3.60 ppt | 3.00 ppt | Detected |
| PFMBA | 10/8/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 10/8/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 10/8/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFHpS | 10/8/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NEtFOSAA | 10/8/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 10/8/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| 8:2 FTS | 10/8/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 10/1/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| NEtFOSAA | 10/1/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 10/1/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 10/1/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFOS | 10/1/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 10/1/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 10/1/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 10/1/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 10/1/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 10/1/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 10/1/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 10/1/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 10/1/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 10/1/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 10/1/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 10/1/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDA | 10/1/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 10/1/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 10/1/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 10/1/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFMBA | 10/1/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
Health-based violations on Castle Pines North MD
0 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for CO0118006.
Sources: EPA SDWIS · Colorado Department of Public Health and Environment, Water Quality Control
Nationwide peers
231 violations · 12,800 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Castle Pines North MD
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Colorado compares on the same EPA violation measures. Colorado systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.