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Transient Non-Community Water System · PWS IA3130886

Rolling Knolls Golf Course

Dyersville, Iowa 52040 - drinking water served from groundwater sources to 118 people, tracked in EPA SDWIS and UCMR5.

118
People served
306
EPA violations
49
Health-based
Untested
UCMR5 result

The verdict

EPA records 306 drinking-water violations at Rolling Knolls Golf Course, 16% of them health-based - above the Iowa per-system average.

306
Total EPA violations on record
16%
Health-based (MCL / treatment failure)
118
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Rolling Knolls Golf Course

Rolling Knolls Golf Course is a private-owned transient non-community water system that delivers drinking water to 118 residents in Dyersville, Iowa (Dubuque County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 306 total violations for this system , of which 49 (16%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 24 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 Public Notice, recorded in 112 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, 127 of 152 UCMR5-tested systems have reported PFAS detections (83.6%).

Rolling Knolls Golf Course's 306 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
118
Total Violations
306
Health-Based Violations
49
Water Source
Groundwater

System Details

System Type
Transient Non-Community
Owner Type
Private
Connections
1
County
Dubuque
School/Daycare
No
MCL Violations
37
Monitoring Violations
24
Treatment Tech Violations
12

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Public Notice Other 112 2024
Coliform (TCR) MCL 21 2006
Nitrate MCL 16 1994
Nitrate MR 13 2014
Revised Total Coliform Rule TT 12 2023
Coliform (TCR) MR 11 2006

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 Rolling Knolls Golf Course.

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 IA3130886 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
2024 Public Notice Other 112 SDWIS / IA3130886 / 7500
2023 Revised Total Coliform Rule TT 12 SDWIS / IA3130886 / 8000
2014 Nitrate MR 13 SDWIS / IA3130886 / 1040
2006 Coliform (TCR) MCL 21 SDWIS / IA3130886 / 3100
2006 Coliform (TCR) MR 11 SDWIS / IA3130886 / 3100
1994 Nitrate MCL 16 SDWIS / IA3130886 / 1040

How Rolling Knolls Golf Course Compares

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

Metric Rolling Knolls Golf Course Iowa avg Federal benchmark
Total violations 306 77 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 49 15.6 Indicates a contaminant exceeded a federal MCL
PFAS detection None 83.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 118 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 Rolling Knolls Golf Course water safe to drink? ▼
Rolling Knolls Golf Course (PWS ID: IA3130886) has 306 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 118 people using Groundwater sources.
How many people does Rolling Knolls Golf Course serve? ▼
Rolling Knolls Golf Course serves 118 people in Dyersville, Iowa. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Rolling Knolls Golf Course have? ▼
Rolling Knolls Golf Course has 306 total violations: 49 health-based violations (MCL exceedances or treatment failures), 24 monitoring/reporting violations, and 12 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Rolling Knolls Golf Course water? ▼
No PFAS testing data is available for Rolling Knolls Golf Course under the EPA's UCMR5 monitoring program.
What water source does Rolling Knolls Golf Course use? ▼
Rolling Knolls Golf Course uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.
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.