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Community Water System · PWS IA8222301

Knollcrest HOA

Leclaire, Iowa 52753 - drinking water served from groundwater sources to 42 people, tracked in EPA SDWIS and UCMR5.

42
People served
289
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 289 drinking-water violations at Knollcrest HOA - above the Iowa per-system average.

289
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
42
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Knollcrest HOA

Knollcrest HOA is a private-owned community water system that delivers drinking water to 42 residents in Leclaire, Iowa (Scott County) through 17 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 289 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 218 monitoring and reporting violations are on file. The most recent violation on record dates to 2018.

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

Across Iowa, EPA tracks 1,795 public water systems serving 3,114,444 people, with 138,271 cumulative violations and 27,946 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 77 violations. Statewide, 32 of 152 UCMR5-tested systems have reported PFAS detections (21.1%).

Knollcrest HOA's 289 violations sit above the Iowa 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
42
Total Violations
289
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
17
County
Scott
School/Daycare
No
MCL Violations
0
Monitoring Violations
218
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Public Notice Other 28 2016
Coliform (TCR) MR 16 2015
Revised Total Coliform Rule MON 8 2018
Gross Alpha, Excl. Radon and U MR 5 2014
Nitrate MR 5 2015
Cadmium MR 5 2005
Chromium MR 5 2005
Selenium MR 5 2005
Mercury MR 5 2005
Combined Radium (-226 and -228) MR 5 2014
Fluoride MR 5 2005
Arsenic MR 5 2005
Barium MR 5 2005
LASSO MR 4 2008
Benzo(a)pyrene MR 4 2008
2,4-D MR 4 2008
Dalapon MR 4 2008
Di(2-ethylhexyl) adipate MR 4 2008
Dinoseb MR 4 2008
Pentachlorophenol MR 4 2008
Picloram MR 4 2008
2,4,5-TP MR 4 2008
1,2-Dichloroethane MR 4 2008
cis-1,2-Dichloroethylene MR 4 2008
1,1-Dichloroethylene MR 4 2008
trans-1,2-Dichloroethylene MR 4 2008
CHLOROBENZENE MR 4 2008
Tetrachloroethylene MR 4 2008
1,1,1-Trichloroethane MR 4 2008
Vinyl chloride MR 4 2008

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 Knollcrest HOA.

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 IA8222301 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Iowa Drinking Water Authority

Iowa's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find IA regulator via EPA SDWIS

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
2018 Revised Total Coliform Rule MON 8 SDWIS / IA8222301 / 8000
2016 Public Notice Other 28 SDWIS / IA8222301 / 7500
2015 Coliform (TCR) MR 16 SDWIS / IA8222301 / 3100
2015 Nitrate MR 5 SDWIS / IA8222301 / 1040
2015 Consumer Confidence Rule Other 4 SDWIS / IA8222301 / 7000
2015 Nitrite MR 4 SDWIS / IA8222301 / 1041
2014 Gross Alpha, Excl. Radon and U MR 5 SDWIS / IA8222301 / 4000
2014 Combined Radium (-226 and -228) MR 5 SDWIS / IA8222301 / 4010
2008 LASSO MR 4 SDWIS / IA8222301 / 2051
2008 Benzo(a)pyrene MR 4 SDWIS / IA8222301 / 2306
2008 2,4-D MR 4 SDWIS / IA8222301 / 2105
2008 Dalapon MR 4 SDWIS / IA8222301 / 2031
2008 Di(2-ethylhexyl) adipate MR 4 SDWIS / IA8222301 / 2035
2008 Dinoseb MR 4 SDWIS / IA8222301 / 2041
2008 Pentachlorophenol MR 4 SDWIS / IA8222301 / 2326

How Knollcrest HOA Compares

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

Metric Knollcrest HOA Iowa avg Federal benchmark
Total violations 289 77 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 15.6 Indicates a contaminant exceeded a federal MCL
PFAS detection None 21.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 42 1,735 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,795 regulated public water systems in Iowa.

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 Knollcrest HOA water safe to drink? ▼
Knollcrest HOA (PWS ID: IA8222301) has 289 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 42 people using Groundwater sources.
How many people does Knollcrest HOA serve? ▼
Knollcrest HOA serves 42 people in Leclaire, Iowa. It is a Private-owned system using Groundwater water sources with 17 service connections.
What type of violations does Knollcrest HOA have? ▼
Knollcrest HOA has 289 total violations: 0 health-based violations (MCL exceedances or treatment failures), 218 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Knollcrest HOA water? ▼
No PFAS testing data is available for Knollcrest HOA under the EPA's UCMR5 monitoring program.
What water source does Knollcrest HOA use? ▼
Knollcrest HOA uses Groundwater 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. 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.