Is Castle Pines North MD water safe to drink?

Castle Pines North MD (PWS ID: CO0118006) has 231 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 4 PFAS compounds found. EPA SDWIS lists this system's service population as 12,800 people using Surface Water sources.

How many people does Castle Pines North MD serve?

EPA SDWIS reports that Castle Pines North MD serves 12,800 people (this public water system's service population, not the municipal population of Castle Pines or any other city). It is a Local-owned system using Surface Water water sources with 4,039 service connections. The operator address is listed in Castle Pines, Colorado.

What type of violations does Castle Pines North MD have?

Castle Pines North MD has 231 total violations: 0 health-based violations (MCL exceedances or treatment failures), 214 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Castle Pines North MD water?

Yes. UCMR5 testing detected 4 PFAS compounds in Castle Pines North MD's water supply: PFBS, PFHxA, PFBA, PFPeA. PFAS are persistent "forever chemicals" that do not break down in the environment.

What water source does Castle Pines North MD use?

Castle Pines North MD uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Where does this data come from?

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Where does Castle Pines North MD sit among U.S. public water systems?

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Castle Pines North MD ranks #3,919 of 29,740 by people served, and #82 of 551 in Colorado. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

How does Castle Pines North MD's violation count compare nationally?

Castle Pines North MD has 231 recorded EPA SDWIS violations, fewer than 13% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 87% of that cohort has fewer violations than Castle Pines North MD. A system can have zero recorded violations and still be actively monitored, and a high violation count often reflects a system that reports thoroughly, not necessarily one with worse water.

States → Colorado

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.

Compiled by PlainWater · May 15, 2026

12,800
People served (this PWS) Larger third of systems: 231
EPA violations (this PWS) Upper third of systems: 0
Health-based (this PWS) Lower third by health-based share: 4 PFAS
UCMR5 (this PWS) Middle third of PFAS-detected systems

Follow published updates (RSS)

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.

PFAS Detected

4 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

C+

Water Safety Score

62/100

Castle Pines North MD

Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.

Health-based violations A+

EPA SDWIS health-based violations on record (MCL, MRDL, treatment technique)

Monitoring & reporting violations F

231

Non-health SDWIS violations (monitoring, reporting, and other compliance)

PFAS contamination B

0.0060 µg/L

Highest PFAS compound level detected in UCMR5 testing

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

How many violations vs. how serious, among peer systems

Castle Pines North MD plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.

30 public water systems (500+ people served), EPA SDWIS current release.

How to read this

Each dot is one public water system; the highlighted dot is Castle Pines North MD. A system to the right has more recorded violations; a system higher up has a larger share of those violations classified health-based rather than monitoring or reporting.

Rare but serious: few violations, but most of them are health-based.
Frequent, mostly paperwork: many violations, but mostly monitoring or reporting, not health-based.
Clean record: below-median on both counts, the tinted corner.

View all 30 systems as a list

City of Ballinger: 372 violations, 85% health-based
Nooksack Valley Water Association: 16 violations, 31% health-based
Montgomery Co RWD 12: 7 violations, 29% health-based
Irvin Water District #6: 11 violations, 27% health-based
Ticonderoga WD: 47 violations, 26% health-based
Pine Valley Plantation: 37 violations, 24% health-based
McLouth, City Of: 29 violations, 17% health-based
Kipling Oaks 1: 25 violations, 16% health-based
South Deerfield Water Supply District: 96 violations, 16% health-based
Sunset Ridge Water District: 82 violations, 15% health-based
Orange Water Dept: 136 violations, 14% health-based
Mount Pleasant Water Sys #1: 167 violations, 11% health-based
Lake Gibson Estates: 42 violations, 2% health-based
Benson Culinary Improvement District: 212 violations, 1% health-based
Conemaugh Twp Muni Auth: 567 violations, 1% health-based
Miccosukee Service Plaza: 0 violations, 0% health-based
Brazoria - Fort Bend Counties MUD 3: 0 violations, 0% health-based
Tanglewilde Thompson Place 600: 2 violations, 0% health-based
Center Water Co: 5 violations, 0% health-based
Spring Mills Elem School/Hvs: 9 violations, 0% health-based
Great Bend Industrial Park: 14 violations, 0% health-based
Glen Park Village: 19 violations, 0% health-based
Camp Is-Sho-Da: 22 violations, 0% health-based
Hamilton: 33 violations, 0% health-based
Town of Welaka: 54 violations, 0% health-based
Township of Blairstown Dpw: 61 violations, 0% health-based
McIntosh Water & Fire Pro Authority: 71 violations, 0% health-based
Clarkdale Municipal Water System: 114 violations, 0% health-based
Eureka Water Association: 273 violations, 0% health-based
Castle Pines North MD: 231 violations, 0% health-based (this system)

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.

EPA SDWIS · PWS CO0118006 CO primacy agency

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.

4 peers

Cross-state systems with similar served population

Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).

4 peers

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.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Compiled by PlainWater, Drinking Water Quality Editorial Process · May 15, 2026

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.