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Non-Transient Non-Community Water System · PWS CO0207401

Jacobs Corner

Boulder, Colorado 80301 - drinking water served from surface water sources to 250 people, tracked in EPA SDWIS and UCMR5.

250
People served
120
EPA violations
18
Health-based
Untested
UCMR5 result

The verdict

EPA records 120 drinking-water violations at Jacobs Corner, 15% of them health-based - above the Colorado per-system average.

120
Total EPA violations on record
15%
Health-based (MCL / treatment failure)
250
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Jacobs Corner

Jacobs Corner is a private-owned non-transient non-community water system that delivers drinking water to 250 residents in Boulder, Colorado (Boulder County) through 3 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 120 total violations for this system , of which 18 (15%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 99 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Surface Water Treatment Rule, recorded in 28 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Colorado, EPA tracks 2,193 public water systems serving 7,473,456 people, with 238,796 cumulative violations and 30,589 health-based violations on record. About 93% of systems in the state carry at least one violation, and state-wide the average per system is 108.9 violations. Statewide, 98 of 163 UCMR5-tested systems have reported PFAS detections (60.1%).

Jacobs Corner's 120 violations sit above the Colorado average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
250
Total Violations
120
Health-Based Violations
18
Water Source
Surface Water

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
3
County
Boulder
School/Daycare
No
MCL Violations
0
Monitoring Violations
99
Treatment Tech Violations
18

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule MR 28 2023
Interim Enhanced Surface Water Treatment Rule MR 21 2023
Surface Water Treatment Rule TT 14 2018
E. COLI MR 6 2017
Interim Enhanced Surface Water Treatment Rule TT 4 2015
Nitrate MR 4 2013
Lead and Copper Rule MR 4 2007
Total Haloacetic Acids (HAA5) MR 3 2010
HEXACHLOROBENZENE MR 3 2008
Methoxychlor MR 3 2008
BHC-GAMMA MR 3 2008
Endrin MR 3 2008
Revised Total Coliform Rule Other 3 2024
Hexachlorocyclopentadiene MR 3 2008
Heptachlor MR 3 2008
Toxaphene MR 3 2008
Chlordane MR 3 2008
Total Polychlorinated Biphenyls (PCB) MR 3 2008
Heptachlor epoxide MR 3 2008
TTHM MR 3 2010

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Jacobs Corner.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID CO0207401 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Colorado Drinking Water Authority

Colorado Department of Public Health and Environment, Water Quality Control is the primacy agency that licenses and inspects Jacobs Corner under EPA-delegated authority.

Open CO regulator portal

Source: Colorado Department of Public Health and Environment, Water Quality Control

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Revised Total Coliform Rule Other 3 SDWIS / CO0207401 / 8000
2023 Surface Water Treatment Rule MR 28 SDWIS / CO0207401 / 0200
2023 Interim Enhanced Surface Water Treatment Rule MR 21 SDWIS / CO0207401 / 0300
2018 Surface Water Treatment Rule TT 14 SDWIS / CO0207401 / 0200
2017 E. COLI MR 6 SDWIS / CO0207401 / 3014
2015 Interim Enhanced Surface Water Treatment Rule TT 4 SDWIS / CO0207401 / 0300
2013 Nitrate MR 4 SDWIS / CO0207401 / 1040
2010 Total Haloacetic Acids (HAA5) MR 3 SDWIS / CO0207401 / 2456
2010 TTHM MR 3 SDWIS / CO0207401 / 2950
2008 HEXACHLOROBENZENE MR 3 SDWIS / CO0207401 / 2274
2008 Methoxychlor MR 3 SDWIS / CO0207401 / 2015
2008 BHC-GAMMA MR 3 SDWIS / CO0207401 / 2010
2008 Endrin MR 3 SDWIS / CO0207401 / 2005
2008 Hexachlorocyclopentadiene MR 3 SDWIS / CO0207401 / 2042
2008 Heptachlor MR 3 SDWIS / CO0207401 / 2065

How Jacobs Corner Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Jacobs Corner Colorado avg Federal benchmark
Total violations 120 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 18 13.9 Indicates a contaminant exceeded a federal MCL
PFAS detection None 60.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 250 3,408 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,193 regulated public water systems in Colorado.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Jacobs Corner water safe to drink? ▼
Jacobs Corner (PWS ID: CO0207401) has 120 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 250 people using Surface Water sources.
How many people does Jacobs Corner serve? ▼
Jacobs Corner serves 250 people in Boulder, Colorado. It is a Private-owned system using Surface Water water sources with 3 service connections.
What type of violations does Jacobs Corner have? ▼
Jacobs Corner has 120 total violations: 18 health-based violations (MCL exceedances or treatment failures), 99 monitoring/reporting violations, and 18 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Jacobs Corner water? ▼
No PFAS testing data is available for Jacobs Corner under the EPA's UCMR5 monitoring program.
What water source does Jacobs Corner use? ▼
Jacobs Corner uses Surface Water as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

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

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