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Tap water quality report

Jefferson County Pwsd 2

EPA monitoring tested this supplier for 98 contaminants and detected 17. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

98
contaminants tested
17
detected
16,548
people served
6
health-based violations
Missouri rankingsLead in MissouriPFAS in Missouri
Water source
Surface 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.

6
health-based violations
74
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1983-01-01 → 1983-12-31
MCL Health-based Archived 1983-01-01 → 1983-12-31
MCL Health-based Archived 1983-01-01 → 1983-12-31
MCL Health-based Archived 1983-01-01 → 1983-12-31
MCL Health-based Archived 1983-01-01 → 1983-12-31
MCL Health-based Archived 1983-01-01 → 1983-12-31
MR Monitoring Resolved 2025-01-01 → 2025-01-31
MR Monitoring Resolved 2025-01-01 → 2025-01-31
MR Monitoring Resolved 2025-01-01 → 2025-01-31
MR Monitoring Resolved 2025-01-01 → 2025-01-31

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Chloroform
50.125 µg/L
No EPA limit set
worst single sample: 199 µg/L
100/100 SYR4 2012–2019
Bromodichloromethane
7.0525 µg/L
No EPA limit set
worst single sample: 10.4 µg/L
96/100 SYR4 2012–2019
TTHM
59.19 µg/L 74%
of the EPA limit 80 µg/L
worst single sample: 206 µg/L
92/92 SYR4 2012–2019
Dichloroacetic Acid
25.25 µg/L
No EPA limit set
worst single sample: 56.1 µg/L
91/92 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
28.78 µg/L 48%
of the EPA limit 60 µg/L
worst single sample: 61.2 µg/L
63/92 SYR4 2012–2019
Trichloroacetic Acid
4.019 µg/L
No EPA limit set
worst single sample: 16.2 µg/L
62/92 SYR4 2012–2019
Dibromochloromethane
3.09 µg/L
No EPA limit set
worst single sample: 3.82 µg/L
51/100 SYR4 2012–2019
Copper
24.64 µg/L 1.9%
of the EPA limit 1300 µg/L
worst single sample: 172 µg/L
43/98 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 27/27 LCR 2024
Nitrate-Nitrite
480 µg/L 4.8%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Chromium
2.597 µg/L 2.6%
of the EPA limit 100 µg/L
worst single sample: 2.73 µg/L
15/16 SYR4 2012–2019
Dibromoacetic Acid
2.08 µg/L
No EPA limit set
worst single sample: 2.1 µg/L
9/92 SYR4 2012–2019
Lead
5.79 µg/L 39%
of the EPA limit 15 µg/L
worst single sample: 7.33 µg/L
9/98 SYR4 2012–2019
Barium
62.82 µg/L 3.1%
of the EPA limit 2000 µg/L
worst single sample: 64.5 µg/L
8/8 SYR4 2012–2019
Fluoride
996 µg/L 25%
of the EPA limit 4000 µg/L
worst single sample: 1010 µg/L
8/8 SYR4 2012–2019
Monochloroacetic Acid
8.779 µg/L
No EPA limit set
worst single sample: 8.81 µg/L
3/92 SYR4 2012–2019
Atrazine
0.3400 µg/L 11%
of the EPA limit 3 µg/L
 1/32 SYR4 2012–2019
81 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicBhc-GammaBenzeneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
DOUGLAS, JAMES
Phone
636-938-5909
Email
[email protected]

Frequently asked questions about Jefferson County Pwsd 2

Is Jefferson County Pwsd 2 tap water safe to drink?

EPA monitoring detected 17 contaminants in Jefferson County Pwsd 2'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 2's water?

EPA monitoring detected Chloroform, Bromodichloromethane, TTHM, Dichloroacetic Acid, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Jefferson County Pwsd 2 serve?

Jefferson County Pwsd 2 reports serving 16,548 people in Missouri, per its EPA record.

Has Jefferson County Pwsd 2 had any water quality violations?

The EPA has 74 violations on file for Jefferson County Pwsd 2, of which 6 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.