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Knierim, IA Tap Water Quality 2026

Water quality report for Knierim, IA — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Knierim's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Knierim Water Supply PWSID: IA1340001 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 2.00 ppb, 13% of the action level and no violations are open. PFAS has never been sampled at this system.

C

Knierim earns a C for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: 2.00 ppb — 13% of the federal action level
PFAS never sampled at this system
8 violations since 2015, 8 health-based
No violations currently open
Knierim's lead level vs. all Iowa community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 2.00 ppb — 13% of the federal action level
✓ Lower lead than 57% of Iowa utilities
Population Served
41
~30 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
8 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
13% of EPA action level
2.00 ppb
Action level: 15 ppb
Copper (Cu)
90th percentile of tap samples. SDWIS reports a copper figure only when a system exceeds the action level, so any value here is an exceedance.
123.1% of EPA action level
1,600 ppb
Action level: 1,300 ppb
The 90th-percentile lead result is 2.00 ppb, 13% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home. Copper reached the action level here; a copper figure appears in SDWIS only when a system triggers it.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Nitrite MCL EXCEEDANCE 1.7539 MG/L 1 mg/L 2024 Resolved
Nitrite MCL EXCEEDANCE 1.1235 MG/L 1 mg/L 2024 Resolved
Nitrite MCL EXCEEDANCE 1.951 MG/L 1 mg/L 2023 Resolved
Nitrite MCL EXCEEDANCE 2.0475 MG/L 1 mg/L 2022 Resolved
Nitrite MCL EXCEEDANCE 1.6 MG/L 1 mg/L 2022 Resolved
Nitrite MCL EXCEEDANCE 1.157 MG/L 1 mg/L 2020 Resolved
Nitrite MCL EXCEEDANCE 1.765 MG/L 1 mg/L 2020 Resolved
Nitrite MCL EXCEEDANCE 1.5 MG/L 1 mg/L 2019 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

8 violations are on record since 2015, of which 8 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Knierim Water Supply
PWSID IA1340001
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 41
Service connections 30
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Knierim tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 2.00 ppb, 13% of the action level.
Does Knierim water have PFAS? ▼
This system has never been sampled for PFAS. EPA's national monitoring covered systems serving 3,300 people or more, so no results exist — which is not evidence that none is present.
Who supplies water to Knierim? ▼
Knierim Water Supply (PWSID IA1340001). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2024-11-07. No significant deficiencies were recorded.

What Should Knierim Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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