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Knox County Public Water & Sewer Dist 1Water quality report

Standards for what was found here

5358
Serves
3,947
Connections
1,793
Water source
Surface water bought from another system
Based in
Knox City, MO
County
Knox
Owner
Local government
The 9 ZIP codes it serves

63440, 63446, 63452, 63458, 63460, 63501, 63531, 63537, 63547

PWSID MO2024313 · EPA data

Read this first

  • Lithium was found in one of 12 samples, highest 24 ppb. Above EPA’s health reference level of 10 ppb, a screening level rather than an enforceable limit.
  • Lead In the latest period, 9 in 10 homes sampled were at or below 1.3 ppb, below the 15 ppb action level. The action level drops to 10 ppb on Nov. 1, 2027. EPA’s health goal for lead is zero.

No health-based violations on file since 2016. EPA lists 11 monitoring or reporting violations, which are paperwork and testing lapses rather than water quality findings.

What handles it

What was found, stop by stop

  • Below the health goal
  • Above the health goal
  • Above the legal limit
  • No federal data

  1. At the source

    EPA UCMR 5 sampled this utility for 29 PFAS and lithium from Feb. 14, 2024 to Jan. 8, 2025. Each tick under a result’s line is one sample where it was found, dated when you point at it.

  2. Lithium

    Above EPA’s health benchmark

    24ppb

    Highest of 12 samples; found in one

    Above EPA’s health reference level of 10 ppb, a screening level rather than an enforceable limit.

    What handles it: No certification claim covers this compound yet.

  3. Also found, with no federal limit

    EPA measured these PFAS to learn how often they occur. None has a legal limit or a health goal yet.

    CompoundHighest sampleFound inCertification claim
    PFBA8.7 ppt8 of 11None covers it

  4. In treatment

    No federal results for this stop. Disinfection byproduct, chlorine and fluoride levels are in Knox County Public Water & Sewer Dist 1’s own annual report, which it must send you every year.

  5. In the pipes

    Lead and copper, from the homes the utility samples. Your own service line, solder and fixtures decide yours.

  6. Lead

    Above the health goal

    1.3ppb

    90th percentile, 2022 to 2024

    In the latest period, 9 in 10 homes sampled were at or below 1.3 ppb, below the 15 ppb action level. The action level drops to 10 ppb on Nov. 1, 2027. EPA’s health goal for lead is zero.

    EPA SDWIS, lead and copper monitoring periods ending 2016 to 2024. The line stops at the latest period; each tick under it is an earlier one.

  7. At your tap

    The last stretch is your own plumbing. A certified lab test is the only way to know what reaches your glass. Lead in your water: what to do

Tested and not found

Below EPA’s minimum reporting level in every sample taken from Feb. 14, 2024 to Jan. 8, 2025. Not found means not measured above that level, which is not the same as zero.

All 28 compounds tested and not found
  • 11Cl-PF3OUdS
  • 4:2 FTS
  • 6:2 FTS
  • 8:2 FTS
  • 9Cl-PF3ONS
  • ADONA
  • HFPO-DA (GenX)
  • NEtFOSAA
  • NFDHA
  • NMeFOSAA
  • PFBS
  • PFDA
  • PFDoA
  • PFEESA
  • PFHpA
  • PFHpS
  • PFHxA
  • PFHxS
  • PFMBA
  • PFMPA
  • PFNA
  • PFOA
  • PFOS
  • PFPeA
  • PFPeS
  • PFTA
  • PFTrDA
  • PFUnA

Violations since 2016

No health-based violations on file with EPA since 2016. There are 11 monitoring or reporting violations: a sample missed, late or not reported.

What handles it

A certification covers specific claims, not a whole standard. Look for these claims on the certifier’s listing, not the box. Wording varies a little: NSF writes “Lead Reduction,” WQA just “Lead.”

At the tap, or for the whole house?

Lead and copper usually come from pipes and fixtures inside or near your home. A whole-house system sits where water enters, so it cannot catch what your own plumbing adds after it. For those, the filter that counts is the one at the tap. How whole-house systems compare.

Compare five-year costs

Filters with those claims on a certifier’s listing

TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money

What this report cannot tell you

  • Levels of everything else. Federal bulk data carries results for PFAS, lithium, lead and copper, and violations for the rest. Nitrate, arsenic, disinfection byproducts and other levels are in Knox County Public Water & Sewer Dist 1’s own annual report, which it must send you every year.
  • Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.
  • Anything after the latest data. SDWIS data is from 2026 Q2; UCMR 5 samples are from Feb. 14, 2024 to Jan. 8, 2025.

Other Missouri utilities

All Missouri utilities

Sources

What to do next

  1. Start with Lithium

    What each marked result does to health, where it comes from, and the certification claim that addresses it.

  2. Read the utility’s own report

    Knox County Public Water & Sewer Dist 1 must send you a water quality report every year. It lists nitrate, arsenic and byproduct levels this page cannot.

  3. Test your own tap for lead

    Your service line, solder and fixtures decide the lead at your faucet, not the utility’s average.

  4. Compare five-year costs

    What the filters certified for these results cost over five years, cartridges included.