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Community Water System · PWS CO0107725

Superior MD No 1

Superior, Colorado 80027 - drinking water served from surface water sources to 17,900 people, tracked in EPA SDWIS and UCMR5.

17,900
People served
165
EPA violations
20
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 165 drinking-water violations at Superior MD No 1, 12% of them health-based - above the Colorado per-system average.

165
Total EPA violations on record
12%
Health-based (MCL / treatment failure)
17,900
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Superior MD No 1

Superior MD No 1 is a local-owned community water system that delivers drinking water to 17,900 residents in Superior, Colorado (Boulder County) through 3,778 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 165 total violations for this system , of which 20 (12%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 142 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Surface Water Treatment Rule, recorded in 11 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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%).

Superior MD No 1's 165 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
17,900
Total Violations
165
Health-Based Violations
20
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
3,778
County
Boulder
School/Daycare
No
MCL Violations
0
Monitoring Violations
142
Treatment Tech Violations
20

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule MR 11 2020
Interim Enhanced Surface Water Treatment Rule TT 8 2013
Surface Water Treatment Rule TT 8 2021
CARBON, TOTAL TT 4 2006
Thallium, Total MR 3 2004
Selenium MR 3 2004
BHC-GAMMA MR 3 2005
Toxaphene MR 3 2005
Dalapon MR 3 2005
Diquat MR 3 2005
Endothall MR 3 2005
Di(2-ethylhexyl) adipate MR 3 2005
OXAMYL MR 3 2005
Dinoseb MR 3 2005
Hexachlorocyclopentadiene MR 3 2005
Carbofuran MR 3 2005
Aldicarb MR 3 2005
LASSO MR 3 2005
Heptachlor epoxide MR 3 2005
2,4,5-TP MR 3 2005
Benzo(a)pyrene MR 3 2005
1,2-DIBROMO-3-CHLOROPROPANE MR 3 2005
Total Polychlorinated Biphenyls (PCB) MR 3 2005
CARBON, TOTAL MR 3 2011
Interim Enhanced Surface Water Treatment Rule MR 3 2020
Arsenic MR 3 2004
Cadmium MR 3 2004
Chromium MR 3 2004
Nickel MR 3 2004
Di(2-ethylhexyl) phthalate MR 3 2005

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
HFPO-DA 8/8/2023 <5.00 ppt 5.00 ppt Not Detected
PFBS 8/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 8/8/2023 <3.00 ppt 3.00 ppt Not Detected
ADONA 8/8/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 8/8/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 8/8/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 8/8/2023 <2.00 ppt 2.00 ppt Not Detected
PFDoA 8/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 8/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 8/8/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 8/8/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 8/8/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpA 8/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 8/8/2023 <5.00 ppt 5.00 ppt Not Detected
PFHxS 8/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 8/8/2023 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 8/8/2023 <5.00 ppt 5.00 ppt Not Detected
PFTA 8/8/2023 <8.00 ppt 8.00 ppt Not Detected
PFHpS 8/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 8/8/2023 <7.00 ppt 7.00 ppt Not Detected
NFDHA 8/8/2023 <20.00 ppt 20.00 ppt Not Detected
6:2 FTS 8/8/2023 <5.00 ppt 5.00 ppt Not Detected
PFMBA 8/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 8/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 8/8/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 8/8/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 8/8/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 8/8/2023 <6.00 ppt 6.00 ppt Not Detected
PFPeS 8/8/2023 <4.00 ppt 4.00 ppt Not Detected
PFMBA 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 5/31/2023 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 5/31/2023 <7.00 ppt 7.00 ppt Not Detected
PFTA 5/31/2023 <8.00 ppt 8.00 ppt Not Detected
PFHpS 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 5/31/2023 <4.00 ppt 4.00 ppt Not Detected
PFEESA 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 5/31/2023 <6.00 ppt 6.00 ppt Not Detected
PFPeA 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 5/31/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 5/31/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 5/31/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 5/31/2023 <5.00 ppt 5.00 ppt Not Detected
PFOS 5/31/2023 <4.00 ppt 4.00 ppt Not Detected
PFBS 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 5/31/2023 <20.00 ppt 20.00 ppt Not Detected
HFPO-DA 5/31/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpA 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 5/31/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 5/31/2023 <4.00 ppt 4.00 ppt Not Detected

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 Superior MD No 1.

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 CO0107725 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 Superior MD No 1 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
2021 Surface Water Treatment Rule TT 8 SDWIS / CO0107725 / 0200
2020 Surface Water Treatment Rule MR 11 SDWIS / CO0107725 / 0200
2020 Interim Enhanced Surface Water Treatment Rule MR 3 SDWIS / CO0107725 / 0300
2013 Interim Enhanced Surface Water Treatment Rule TT 8 SDWIS / CO0107725 / 0300
2011 CARBON, TOTAL MR 3 SDWIS / CO0107725 / 2920
2006 CARBON, TOTAL TT 4 SDWIS / CO0107725 / 2920
2006 Fluoride MR 2 SDWIS / CO0107725 / 1025
2005 BHC-GAMMA MR 3 SDWIS / CO0107725 / 2010
2005 Toxaphene MR 3 SDWIS / CO0107725 / 2020
2005 Dalapon MR 3 SDWIS / CO0107725 / 2031
2005 Diquat MR 3 SDWIS / CO0107725 / 2032
2005 Endothall MR 3 SDWIS / CO0107725 / 2033
2005 Di(2-ethylhexyl) adipate MR 3 SDWIS / CO0107725 / 2035
2005 OXAMYL MR 3 SDWIS / CO0107725 / 2036
2005 Dinoseb MR 3 SDWIS / CO0107725 / 2041

How Superior MD No 1 Compares

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

Metric Superior MD No 1 Colorado avg Federal benchmark
Total violations 165 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 20 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 17,900 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 Superior MD No 1 water safe to drink? ▼
Superior MD No 1 (PWS ID: CO0107725) has 165 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 17,900 people using Surface Water sources.
How many people does Superior MD No 1 serve? ▼
Superior MD No 1 serves 17,900 people in Superior, Colorado. It is a Local-owned system using Surface Water water sources with 3,778 service connections.
What type of violations does Superior MD No 1 have? ▼
Superior MD No 1 has 165 total violations: 20 health-based violations (MCL exceedances or treatment failures), 142 monitoring/reporting violations, and 20 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Superior MD No 1 water? ▼
No. Superior MD No 1 was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Superior MD No 1 use? ▼
Superior MD No 1 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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). 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.