Public water system · CO0107118

Active

Arbordale Acres MHP

At a glance

Arbordale Acres MHP (PWSID CO0107118) is an active community water system in Boulder County, Colorado. It reports serving 901 people through 286 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's records list 8 violations for this system; 1 is health-based, and the most recent began in March 2026.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

901

Service connections

286

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDCO0107118

System typeCommunity water system

Activity statusActive

Population served901

Service connections286

Primary water sourcePurchased surface water

Owner typePrivate

Primacy agencyCO state drinking water program

City served—

StateColorado

ZIP—

CountyBoulder County

How does Arbordale Acres MHP compare with other water systems in Boulder County?

By EPA's size categories, Arbordale Acres MHP is a small system (501 to 3,300 people). Boulder County has 81 active public water systems. Its population served is well below the county average of 5,397 people per system, and accounts for 0.2% of the 437,116 people reported by systems filed under the county. Across Colorado, the 2,207 active systems average 3,400 people each. Nationally, the average active community water system reports serving 6,703 people, so Arbordale Acres MHP is well below that figure.

What does “community water system” mean?

A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Colorado has 1,068 active community water systems, 48% of the state's 2,207 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 337 Colorado systems (15%) list purchased surface water as their primary source.

Who owns and regulates Arbordale Acres MHP?

EPA lists Arbordale Acres MHP as privately owned. The CO state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 53 of the 81 active systems in Boulder County (65%) are also privately owned.

Does Arbordale Acres MHP have drinking water violations?

EPA's records list 8 violations for this system; 1 is health-based, and the most recent began in March 2026. The violations listed here began between January 2025 and March 2026. By type: 4 monitoring and reporting, 2 public notice, recordkeeping or other, 1 required treatment not met and 1 monitoring. The contaminant or rule involved most often is Revised Total Coliform Rule (2 of them). EPA lists 8 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.

Began	Violation	Contaminant or rule	Health-based	Status
2026-03-25	Public notice, recordkeeping or otherSample Siting Plan Errors (RTCR) · code 5A	Revised Total Coliform Rulecode 8000	No	Resolved
2025-05-17	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2025-04-12	Required treatment not metTreatment Technique No Certif. Operator · code 12	Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400	Yes	Resolved
2025-02-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2025-02-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2025-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2025-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2025-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved

All 8 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.

Arbordale Acres MHP: frequently asked questions

Who runs Arbordale Acres MHP?

Arbordale Acres MHP (PWSID CO0107118) is a community water system privately owned. It is regulated by the CO state drinking water program.

How many people does Arbordale Acres MHP serve?

Arbordale Acres MHP reports serving 901 people through 286 service connections in Boulder County, Colorado.

Where does Arbordale Acres MHP get its water?

EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.

Does Arbordale Acres MHP have any drinking water violations?

EPA's records list 8 violations for this system; 1 is health-based, and the most recent began in March 2026. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.

Is Arbordale Acres MHP's water safe to drink?

AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 8 violations for this system; 1 is health-based, and the most recent began in March 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the CO state drinking water program.

Where can I find Arbordale Acres MHP's water quality report?

As a community water system, Arbordale Acres MHP must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.

Other water systems in Boulder County

Water system	County	Population served	Type	Source
Boulder City of	Boulder	166,080	Community	Surface water
Longmont City of	Boulder	104,178	Community	Surface water
Erie Town of	Boulder	47,444	Community	Surface water
Lafayette City of	Boulder	28,700	Community	Surface water
Louisville City of	Boulder	20,975	Community	Surface water
Left Hand Wd	Boulder	20,280	Community	Surface water

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About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Arbordale Acres MHP, PWSID CO0107118, Colorado”, https://aquacensus.com/water-systems/colorado/arbordale-acres-mhp-co0107118 (data as of October 1, 2026).