Current Noncompliance ID

City of Lewiston

EPA ID: ID2350014 ยท 15,001 people served ยท 2 ZIP codes

ZipCheckup's reading of EPA records for City of Lewiston (ID2350014): 4 violations recorded with unresolved status in the SDWIS data used. In the federal compliance data used here, City of Lewiston has 4 violations listed as open; the utility serves approximately 15,001 people.

Data: EPA SDWIS

A ยท 92
Avg Safety Score
15,001
People Served
2
ZIP Codes Served
42
Violations (since 2021)
Surface Water
Water Source
0.001 mg/L
Most recent lead 90th percentile on record (monitoring period ending 2025-12-31)
Zone 1
County Radon Potential ยท High
42
Contaminants Flagged
$307K
Median Home Value in ZIP Codes Served

Service Area Map

Coverage area for City of Lewiston Source: EPA SDWIS service area boundaries.

Service area boundary - average Home Safety grade of mapped ZIPs: A

Demographics of ZIP Codes Served

$76,163
Median Household Income
39,534
Population of ZIP Codes Served (Census)
17%
Disadvantaged Population
40th
Poverty Percentile
35th
Energy Burden Percentile
73%
Pre-1986 Housing

The ZIP codes associated with City of Lewiston have a median household income of $76,163 and about 39,534 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 73% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.

๐ŸŒŠ Where Does Your Water Come From?

Surface Water

City of Lewiston's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.

Elevated Risk
Source Contamination Risk
40th
Wastewater Discharge Proximity
5th
Superfund Site Proximity

Infrastructure Risk

56 yr
Estimated pipe age (modeled from housing age)
Copper
Likely pipe material (modeled)
12 yr
Est. Remaining Life
Moderate Wear
Decay Status
Installed 82% of expected lifespan used (estimate) End of life

PFAS in ZIP Codes This System Serves

PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 3 detections recorded.

Health concern: Exposure to certain PFAS has been associated with some cancers and with immune and developmental effects; effects differ by compound. Many PFAS break down very slowly in the environment.
Recommended filter: An activated carbon filter certified under NSF/ANSI 53 or a reverse osmosis system certified under NSF/ANSI 58 for the PFAS listed in its certification. Find the right filter โ†’

Comparable Water Systems

Similar-sized systems in Idaho

City of Mountain Home
14,651 people
149 violations
City of Chubbuck
15,842 people
C 1 violation
B 1 violation
City of Blackfoot
13,224 people
90 violations
City of Middleton
13,190 people
B 0 violations

Estimated Remediation Costs

Average estimated costs across ZIP codes served by this system

PFAS Treatment
PFAS Treatment $500
Total Estimated Cost $500

Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.

Cost of Inaction

Illustrative per-household cost scenario based on stated assumptions:

Estimated Healthcare Costs $1,500

Annual per household (ZipCheckup estimate)

PFAS Exposure - Lifetime Cost $1,000

Per person (emerging research est.)

Estimated Cumulative Cost Per Household

5 years
$7,665
10 years
$15,330
20 years
$30,660

Compare: Estimated remediation cost is $500 (one-time) vs. $15,330 in estimated inaction costs over 10 years.

Individual costs vary by household size, property, and health factors. These estimates are for awareness, not financial advice.

System Overview

City of Lewiston (EPA ID: ID2350014) is a community water system in Idaho that serves approximately 15,001 people from surface water sources.

This system provides water to 2 ZIP codes across 2 communities.

ZIP-Area Home Safety Context: A (92/100)

This is the average Home Safety Score for 1 of 2 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.

Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.

Violation History

4 current noncompliance records in the accepted 2026Q2 snapshot; none are classified as health-based in this evidence.

Status breakdown for accepted records with record years 2021-2026: 0 resolved, 38 archived, 0 addressed, and 4 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.

Recent Violations

Date Contaminant Type Status
January 1, 2023 Barium Non-health-based Archived
January 1, 2023 Cadmium Non-health-based Archived
January 1, 2023 Chromium Non-health-based Archived
January 1, 2023 Mercury Non-health-based Archived
January 1, 2023 Nickel Non-health-based Archived
January 1, 2023 Antimony, Total Non-health-based Archived
January 1, 2023 Beryllium, Total Non-health-based Archived
January 1, 2023 Thallium, Total Non-health-based Archived
January 1, 2023 Selenium Non-health-based Archived
January 1, 2023 Endrin Non-health-based Archived
January 1, 2023 BHC-GAMMA Non-health-based Archived
January 1, 2023 Methoxychlor Non-health-based Archived
January 1, 2023 Toxaphene Non-health-based Archived
January 1, 2023 Dalapon Non-health-based Archived
January 1, 2023 Diquat Non-health-based Archived
January 1, 2023 Endothall Non-health-based Archived
January 1, 2023 Glyphosate Non-health-based Archived
January 1, 2023 Di(2-ethylhexyl) adipate Non-health-based Archived
January 1, 2023 OXAMYL Non-health-based Archived
January 1, 2023 Simazine Non-health-based Archived

Contaminants Detected

The following contaminants have been flagged in EPA records for this water system:

Contaminant Category Violations Health-Based
Barium Monitoring & Reporting 1 No
Barium Monitoring & Reporting 1 No
Cadmium Monitoring & Reporting 1 No
Antimony, Total Monitoring & Reporting 1 No
Nickel Other Violation 1 No
Selenium Other Violation 1 No
Antimony, Total Monitoring & Reporting 1 No
Beryllium, Total Other Violation 1 No
Thallium, Total Other Violation 1 No
Endrin Other Violation 1 No
BHC-GAMMA Other Violation 1 No
Methoxychlor Other Violation 1 No
Toxaphene Other Violation 1 No
Dalapon Other Violation 1 No
Diquat Other Violation 1 No

Lead & Copper

EPA Lead and Copper Rule evidence attributed directly to this water system:

Lead Level Exceeds Action Level Sample Date
0.001 mg/L No 2025-12-31

No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.

Radon Risk in Service Area

1 of 2 ZIP records with known zones is in EPA Radon Zone 1. 1 of 2 ZIP records with known zones is in EPA Radon Zone 3.

The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.

ZIP Codes Served

Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by ID or modeled from parcel and building-footprint data.

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for City of Lewiston (ID2350014) on EPA.gov.

Frequently Asked Questions

Is City of Lewiston water safe to drink?

The accepted 2026Q2 ECHO snapshot shows 4 current noncompliance records and zero current records classified as health-based. That classification is not a property-specific water test or safety guarantee.

How many people does City of Lewiston serve?

City of Lewiston serves approximately 15,001 people across 2 ZIP codes in Idaho.

Where does City of Lewiston get its water?

The primary water source is surface water.

Federal UCMR5 PFAS Monitoring: Detected

This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected; the table compares each one with the EPA MCL where one exists (April 2024 rule, compliance required from 2029) and with this state's enforceable standard where one exists.

Samples collected
406
Detections
3
Latest sample
3/17/2025
Highest analyte
PFBS: 5.6 ppt
Analyte Max detected EPA MCL (compliance required from 2029) Status
PFBS 5.6 ppt No federal MCL โ€”
PFPeA 4.7 ppt No federal MCL โ€”
PFHxA 4.3 ppt No federal MCL โ€”

EPA's April 2024 PFAS rule sets MCLs of 4 ppt for PFOA and PFOS and 10 ppt for PFHxS, PFNA and HFPO-DA (GenX); water systems must comply from 2029. Other PFAS compounds have no individual federal MCL. A state standard is shown only where this system's state has its own enforceable PFAS limit. Detection results are EPA UCMR5 samples, not a measurement at your tap.

Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) โ€” per-system federal sampling, 2023โ€“2025. EPA UCMR5 monitoring program โ†’

Understand PFAS health context and filtration โ†’

How Water Systems Appear in Rankings

Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.

Frequently Asked Questions

Is water from City of Lewiston safe to drink? ▼
City of Lewiston has 42 recorded violations since 2021. The A shown is a ZIP-area score, not a grade for this utility; see the violation table for what was violated.
Should I use a water filter? ▼
Given 42 recorded violations, review the violation types and dates; a filter certified for a specific contaminant of concern can reduce that contaminant at the tap. Monitoring or reporting violations are not something a filter addresses.
How many people does City of Lewiston serve? ▼
City of Lewiston serves approximately 15,001 people with drinking water across 2 ZIP codes.
What is City of Lewiston's water source? ▼
City of Lewiston draws water from surface water sources. Source type affects which contaminants are most likely to be present.
Is there lead in City of Lewiston's water? ▼
The most recent 90th-percentile lead result on record is 0.001 mg/L (sample period ending 2025-12-31). This is at or below the EPA lead action level, which triggers system action and is not a safe level; the EPA health goal for lead is zero.
What is the demographic profile of the ZIP codes associated with City of Lewiston? ▼
The ZIP codes mapped to City of Lewiston have a median household income of $76,163 (Census ZIP-code estimate). Demographic data is sourced from the U.S. Census Bureau and EPA EJScreen.
Where does City of Lewiston get its water? ▼
City of Lewiston's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap. The available violation history and environmental indicators place this system in the elevated review category; they do not measure current source contamination.

How to cite this page

APA ZipCheckup. (n.d.). City of Lewiston (ID): 42 EPA Violations. https://zipcheckup.com/water-system/id2350014/
BibTeX
@misc{zipcheckup-water-system-id2350014,
  author = {{ZipCheckup}},
  title  = {{City of Lewiston (ID): 42 EPA Violations}},
  year   = {n.d.},
  url    = {https://zipcheckup.com/water-system/id2350014/}
}

What You Can Do

1

Test your water

Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter โ†’

2

Check your specific ZIP code

Water quality can vary within a system. View nearest ZIP report โ†’

3

Contact your utility

City of Lewiston (EPA ID: ID2350014) - request the latest Consumer Confidence Report or ask about specific contaminants.

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