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Tap water quality report

Hillsboro

EPA monitoring tested this supplier for 63 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

63
contaminants tested
10
detected
3,000
people served
56
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.

56
health-based violations
71
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2025-06-30
TT Health-based Resolved 2025-06-30
TT Health-based Resolved 2025-06-30
TT Health-based Resolved 2025-06-30
MCL Health-based Resolved 2012-05-01 → 2012-05-31
MCL Health-based Resolved 2012-05-01 → 2012-05-31
MCL Health-based Resolved 2012-05-01 → 2012-05-31
MCL Health-based Resolved 2012-05-01 → 2012-05-31
MCL Health-based Resolved 2011-06-01 → 2011-06-30
MCL Health-based Resolved 2011-06-01 → 2011-06-30

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
261 µg/L 20%
of the EPA limit 1300 µg/L
 35/36 SYR4 2012–2018
Lead
13.3 µg/L 89%
of the EPA limit 15 µg/L
 34/36 SYR4 2012–2018
Nitrate-Nitrite
46 µg/L 0.5%
of the EPA limit 10000 µg/L
 34/48 SYR4 2012–2019
Lead
0.0043 mg/L 29%
of the EPA limit 0.0150 mg/L
 23/23 LCR 2024
Barium
233 µg/L 12%
of the EPA limit 2000 µg/L
 6/6 SYR4 2014–2017
Chromium
2.17 µg/L 2.2%
of the EPA limit 100 µg/L
 4/6 SYR4 2014–2017
Arsenic
2.3 µg/L 23%
of the EPA limit 10 µg/L
 3/6 SYR4 2014–2017
Cadmium
0.2800 µg/L 5.6%
of the EPA limit 5 µg/L
 2/6 SYR4 2014–2017
Combined Radium (-226 And -228)
1.6 pCi/L 32%
of the EPA limit 5 pCi/L
 2/3 SYR4 2016
Fluoride
110 µg/L 2.8%
of the EPA limit 4000 µg/L
 1/6 SYR4 2014–2017
53 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, TotalBromodichloromethaneBromoformChlorobenzeneCyanideCarbofuranCarbon TetrachlorideChlordaneChloroformDichloromethaneDalaponDibromochloromethaneDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
RUSSELL, BUDDY
Phone
636-797-3334

Frequently asked questions about Hillsboro

Is Hillsboro tap water safe to drink?

EPA monitoring detected 10 contaminants in Hillsboro'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 Hillsboro's water?

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

How many people does Hillsboro serve?

Hillsboro reports serving 3,000 people in Missouri, per its EPA record.

Has Hillsboro had any water quality violations?

The EPA has 71 violations on file for Hillsboro, of which 56 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.