Is Herculaneum, MO tap water safe?
The short answer
None of the 5 utilities serving Herculaneum has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records.
Herculaneum PWS, which serves the most people here, has 1 result above EPA’s health benchmark. The worst: Lithium at 22 ppb, above EPA’s health benchmark. A health benchmark is a level EPA screens with, not a legal limit.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Herculaneum’s ZIP codes, from EPA’s estimates.
- Open report
Herculaneum PWS
Missouri · serves 5,000 people · about 2,700 in Herculaneum
1 result above EPA’s health benchmark. The worst: Lithium at 22 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Festus PWS
Missouri · serves 13,000 people · about 830 in Herculaneum
1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 19.1 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Jefferson County PWSD 7
Missouri · serves 6,100 people · about 780 in Herculaneum
2 results above the health goal. The worst: Lead at 1.7 ppb, above the health goal.
No health-based violations since 2016
- Open report
Pevely PWS
Missouri · serves 5,600 people · under 100 in Herculaneum
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 44.1 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Jefferson County Water Authority
Missouri · serves 25 people · lists Herculaneum among the places it serves
1 result above the health goal. The worst: Arsenic at 2.1 ppb, above the health goal.
No health-based violations since 2016
Water testing near Herculaneum
The 3 labs Missouri certifies closest to Herculaneum, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
EMSL Analytical Inc.-St. Louis
St. Louis, MO · about 22 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics
Eastern Missouri Water Lab
Lonedell, MO · about 26 miles
Certified for bacteria
Pace Analytical Services LLC-Hazelwood
Hazelwood, MO · about 27 miles
Certified for bacteria
Missouri State Public Health Laboratory: Coliform and E. coli testing for private wells and other private drinking water sources, in kits from your local public health agency. A free state courier can carry the sample to the lab overnight. The handling fee is $10, by check or money order. Private Drinking Water Bacteriological Testing, Missouri Department of Health and Senior Services.
All 64 certified labs for MissouriWhich ZIP codes are in Herculaneum: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Missouri DNR, certified microbiological and chemical laboratories; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Herculaneum
Other towns in Jefferson County with a page of their own.
What to do next
- Read Herculaneum PWS’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About LithiumWhat it does to health, where it comes from, and the certification claim that addresses it.About Lithium
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water