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Tap water quality report

Jefferson County Pwsd 12

EPA monitoring tested this supplier for 69 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

69
contaminants tested
13
detected
3,300
people served
0
health-based violations
Missouri rankingsLead in MissouriPFAS in Missouri
Water source
Ground water
Ownership
Local government
Counties served
Jefferson

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

0
health-based violations
7
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2014-07-01 → 2014-07-31
MR Monitoring Resolved 2014-07-01 → 2014-07-31
MR Monitoring Resolved 2014-07-01 → 2014-07-31
MR Monitoring Resolved 2014-07-01 → 2014-07-31
MR Monitoring Resolved 1998-07-01 → 1998-07-31
MR Monitoring Resolved 1998-07-01 → 1998-07-31
MR Monitoring Resolved 1998-07-01 → 1998-07-31

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
241 µg/L 19%
of the EPA limit 1300 µg/L
 26/26 SYR4 2014–2017
Lead
0.0032 mg/L 21%
of the EPA limit 0.0150 mg/L
 19/19 LCR 2023
Lead
19.3 µg/L 129%
of the EPA limit, in the worst sample — 15 µg/L
 18/26 SYR4 2014–2017
Nitrate-Nitrite
340 µg/L 3.4%
of the EPA limit 10000 µg/L
 16/50 SYR4 2012–2019
Barium
233 µg/L 12%
of the EPA limit 2000 µg/L
 6/6 SYR4 2014–2017
Chromium
3.57 µg/L 3.6%
of the EPA limit 100 µg/L
 6/6 SYR4 2014–2017
Bromodichloromethane
4.18 µg/L
No EPA limit set
 2/13 SYR4 2013–2019
Chloroform
4.35 µg/L
No EPA limit set
 2/13 SYR4 2013–2019
Arsenic
3.1 µg/L 31%
of the EPA limit 10 µg/L
 1/6 SYR4 2014–2017
Bromoform
1.03 µg/L
No EPA limit set
 1/13 SYR4 2013–2019
Dibromochloromethane
3.31 µg/L
No EPA limit set
 1/13 SYR4 2013–2019
Dichloroacetic Acid
1.6 µg/L
No EPA limit set
 1/7 SYR4 2013–2019
TTHM
12.9 µg/L 16%
of the EPA limit 80 µg/L
 1/7 SYR4 2013–2019
56 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined Radium (-226 And -228)DichloromethaneDalaponDibromoacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneFluorideHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BRYANT, BRAD
Phone
636-937-9697
Email
Brad.bryant@pwsd12.com

Frequently asked questions about Jefferson County Pwsd 12

Is Jefferson County Pwsd 12 tap water safe to drink?

EPA monitoring detected 13 contaminants in Jefferson County Pwsd 12's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Jefferson County Pwsd 12's water?

EPA monitoring detected Copper, Lead, Lead, Nitrate-Nitrite, Barium, and others. The full list with the level and data source for each is above.

How many people does Jefferson County Pwsd 12 serve?

Jefferson County Pwsd 12 reports serving 3,300 people in Missouri, per its EPA record.

Has Jefferson County Pwsd 12 had any water quality violations?

The EPA has 7 violations on file for Jefferson County Pwsd 12, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.