Tap WaterIndex

Tap water quality report

Hillsboro Waterworks

EPA monitoring tested this supplier for 77 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

77
contaminants tested
19
detected
1,325
people served
55
health-based violations
Water source
Ground water
Ownership
Local government
Counties served
Vernon

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.

55
health-based violations
92
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2023-03-11
TT Health-based Resolved 2023-03-11
TT Health-based Resolved 2023-03-11
TT Health-based Resolved 2023-03-11
TT Health-based Resolved 2021-09-17
TT Health-based Resolved 2021-09-17
TT Health-based Resolved 2021-09-17
TT Health-based Resolved 2021-09-17
TT Health-based Resolved 2021-09-17
TT Health-based Resolved 2021-09-17

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
Copper
1702 µg/L 131%
of the EPA limit, at the 95th percentile of samples — 1300 µg/L
worst single sample: 2430 µg/L
113/116 SYR4 2013–2019
Lead
15.19 µg/L 101%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 84 µg/L
75/116 SYR4 2013–2019
Nitrate
2615 µg/L 26%
of the EPA limit 10000 µg/L
worst single sample: 2700 µg/L
38/38 SYR4 2012–2019
Lead
0.0032 mg/L 21%
of the EPA limit 0.0150 mg/L
 27/27 LCR 2025
Barium
52.21 µg/L 2.6%
of the EPA limit 2000 µg/L
worst single sample: 53.8 µg/L
7/7 SYR4 2013–2017
Nitrate-Nitrite
2550 µg/L 26%
of the EPA limit 10000 µg/L
worst single sample: 2700 µg/L
7/7 SYR4 2013–2017
Combined Radium (-226 And -228)
4.3225 pCi/L 86%
of the EPA limit 5 pCi/L
worst single sample: 4.9 pCi/L
6/6 SYR4 2013–2017
TTHM
7.83 µg/L 9.8%
of the EPA limit 80 µg/L
worst single sample: 8.7 µg/L
6/6 SYR4 2014–2019
Total Haloacetic Acids (HAA5)
0.8875 µg/L 1.5%
of the EPA limit 60 µg/L
worst single sample: 0.8900 µg/L
6/6 SYR4 2014–2019
Gross Alpha, Excl. Radon And U
5.34 pCi/L 36%
of the EPA limit 15 pCi/L
worst single sample: 5.4 pCi/L
5/5 SYR4 2015–2017
Dibromoacetic Acid
0.5400 µg/L
No EPA limit set
worst single sample: 0.5700 µg/L
4/6 SYR4 2014–2019
Bromodichloromethane
1.875 µg/L
No EPA limit set
worst single sample: 1.9 µg/L
2/17 SYR4 2014–2019
Bromoform
2.435 µg/L
No EPA limit set
worst single sample: 2.5 µg/L
2/17 SYR4 2014–2019
Dibromochloromethane
3.035 µg/L
No EPA limit set
worst single sample: 3.1 µg/L
2/17 SYR4 2014–2019
Fluoride
249.5 µg/L 6.2%
of the EPA limit 4000 µg/L
worst single sample: 250 µg/L
2/5 SYR4 2014–2017
Chloroform
1.2 µg/L
No EPA limit set
 1/17 SYR4 2014–2019
Dichloroacetic Acid
0.2800 µg/L
No EPA limit set
 1/6 SYR4 2014–2019
Gross Beta Particle Activity
4 pCi/L
No EPA limit set
 1/1 SYR4 2014
Trichloroacetic Acid
0.2900 µg/L
No EPA limit set
 1/6 SYR4 2014–2019
58 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Frequently asked questions about Hillsboro Waterworks

Is Hillsboro Waterworks tap water safe to drink?

EPA monitoring detected 19 contaminants in Hillsboro Waterworks'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 Waterworks's water?

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

How many people does Hillsboro Waterworks serve?

Hillsboro Waterworks reports serving 1,325 people, per its EPA record.

Has Hillsboro Waterworks had any water quality violations?

The EPA has 92 violations on file for Hillsboro Waterworks, of which 55 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.