64661
Mercer, MO
Mercer County
MERCER COUNTY PWSD 1

Is Mercer tap water safe to drink?

Some concern
Last tested: October 2024
Source: Official EPA UCMR5 federal monitoring data. Last tested October 2024.
City:
Townships:
  • Marion, MO
  • Somerset, MO
  • Lindley, MO
Neighborhood:
  • Mercer

The short answer for Mercer

Mercer tap water has 1 detected contaminant, currently below EPA limits (tested October 2024). lithium measured closest to the threshold. See the full compound-by-compound report.

The health risk for Mercer

lithium was detected in local water tests, currently below EPA limits. Even below-limit detections can still be meaningful for sensitive households, so a targeted certified filter can add protection.
  • PFAS or other chemicals detected; no confirmed exceedances in multiple samples.
lithium concentration (µg/L) October 2024
0 µg/L 10 µg/L 20 µg/L
9.600 µg/L
Detected
µg/L
10 µg/L
EPA limit
guideline
96% of limit
Comparison
vs. guideline
EPA limit: 10 µg/L | Your water: 9.600 µg/L
Add a Layer of Protection for Mercer Tap Water

lithium was detected below EPA limits. A certified filter can still add an extra layer of protection.

Water filter recommendation for Mercer tap water: Epic Pure XP Water Filter Pitcher
Pitcher filter
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Most elevated compounds
Compound Measurement EPA Limit Comparison
lithium
Tested: October 2024 · MERCER COUNTY PWSD 1		 9.600 µg/L 10 µg/L 96% of limit
View all tested compounds

Chariton River @ Plant after Treatment · Tested: August 2024

Compound Measurement EPA Limit Comparison
lithium <9.000 µg/L 10 µg/L Below limit
PFHxS <0.003 µg/L 0.004 µg/L Below limit
HFPO-DA <0.005 µg/L 0.01 µg/L Below limit
PFNA <0.004 µg/L 0.01 µg/L Below limit
PFHxA <0.003 µg/L 3 µg/L Below limit
PFBA <0.005 µg/L 6 µg/L Below limit
11Cl-PF3OUdS <0.005 µg/L 0.005 µg/L Below limit
4:2 FTS <0.003 µg/L 0.003 µg/L Below limit
6:2 FTS <0.005 µg/L 0.005 µg/L Below limit
8:2 FTS <0.005 µg/L 0.005 µg/L Below limit
9Cl-PF3ONS <0.002 µg/L 0.002 µg/L Below limit
ADONA <0.003 µg/L 0.003 µg/L Below limit
PFBS <0.003 µg/L 0.003 µg/L Below limit
PFDA <0.003 µg/L 0.003 µg/L Below limit
PFDoA <0.003 µg/L 0.003 µg/L Below limit
PFHpA <0.003 µg/L 0.003 µg/L Below limit
PFHpS <0.003 µg/L 0.003 µg/L Below limit
PFOA <0.004 µg/L 0.004 µg/L Below limit
PFOS <0.004 µg/L 0.004 µg/L Below limit
PFPeA <0.003 µg/L 0.003 µg/L Below limit
PFTrDA <0.007 µg/L 0.007 µg/L Below limit
PFUnA <0.002 µg/L 0.002 µg/L Below limit

MERCER COUNTY PWSD 1 · Tested: October 2024

Compound Measurement EPA Limit Comparison
lithium 9.600 µg/L 10 µg/L 96% of limit
PFHxS <0.003 µg/L 0.004 µg/L Below limit
HFPO-DA <0.005 µg/L 0.01 µg/L Below limit
PFNA <0.004 µg/L 0.01 µg/L Below limit
PFHxA <0.003 µg/L 3 µg/L Below limit
PFBA <0.005 µg/L 6 µg/L Below limit
11Cl-PF3OUdS <0.005 µg/L 0.005 µg/L Below limit
4:2 FTS <0.003 µg/L 0.003 µg/L Below limit
6:2 FTS <0.005 µg/L 0.005 µg/L Below limit
8:2 FTS <0.005 µg/L 0.005 µg/L Below limit
9Cl-PF3ONS <0.002 µg/L 0.002 µg/L Below limit
ADONA <0.003 µg/L 0.003 µg/L Below limit
PFBS <0.003 µg/L 0.003 µg/L Below limit
PFDA <0.003 µg/L 0.003 µg/L Below limit
PFDoA <0.003 µg/L 0.003 µg/L Below limit
PFHpA <0.003 µg/L 0.003 µg/L Below limit
PFHpS <0.003 µg/L 0.003 µg/L Below limit
PFOA <0.004 µg/L 0.004 µg/L Below limit
PFOS <0.004 µg/L 0.004 µg/L Below limit
PFPeA <0.003 µg/L 0.003 µg/L Below limit
PFTrDA <0.007 µg/L 0.007 µg/L Below limit
PFUnA <0.002 µg/L 0.002 µg/L Below limit

Rathbun Lake Caisson @ Plant After Treatment · Tested: August 2024

Compound Measurement EPA Limit Comparison
lithium <9.000 µg/L 10 µg/L Below limit
PFTrDA <0.007 µg/L 0.007 µg/L Below limit

Water utilities serving ZIP 64661

Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.

Modeled boundaries are shown with a dashed outline.

Frequently Asked Questions about ZIP 64661 Tap Water

What's in ZIP 64661 tap water?

ZIP 64661 has 1 detected contaminant below EPA limits in this dataset. lithium measured closest to its guideline.

Will boiling ZIP 64661 tap water remove lithium?

No. Boiling tap water does not remove lithium. Lithium is a dissolved mineral, so heat does not break it down and evaporation can actually concentrate it. Reverse osmosis (NSF/ANSI 58) is the most reliable at-home option for reducing lithium.

Do basic pitcher filters remove lithium?

Standard pitcher filters are not certified to reduce lithium. Reverse osmosis (NSF/ANSI 58) is the most widely available home option for reducing lithium in drinking water.

Who provides tap water in ZIP 64661?

Public records identify MERCER COUNTY PWSD 1 as a primary water system associated with ZIP 64661. Service boundaries can vary by address, so confirm exact service with the utility.

When was ZIP 64661 tap water last tested?

The most recent test date used in this report is October 2024. EnviroClarity last refreshed this page on 2026-05-05.

Where can I find the official water quality report for ZIP 64661?

Every U.S. public water system is required to publish an annual Consumer Confidence Report (CCR). Contact MERCER COUNTY PWSD 1 or visit their website for the latest official report covering ZIP 64661. The EPA also maintains a national CCR locator.

Primary source EPA UCMR5 (2023-2025)
Guideline source EPA drinking water standard (PFTrDA: 0,007 µg/L)
Last tested October 2024
Last page update 2026-05-05

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    Nearby ZIP reports

    Data reflects publicly reported utility records from EPA datasets and local utility disclosures. This information is educational and not medical advice.

    Filter Mercer tap water → see certified options