Tap WaterIndex

← Oregon

Tap water quality report

Hillsboro-Cherry Grove

EPA monitoring tested this supplier for 74 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

74
contaminants tested
11
detected
1,628
people served
7
health-based violations
Oregon rankingsLead in OregonPFAS in Oregon
Water source
Surface water
Ownership
Local government
Counties served
Washington

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.

7
health-based violations
54
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2002-01-02
TT Health-based Resolved 2002-01-02
TT Health-based Resolved 1998-07-01
TT Health-based Resolved 1998-07-01
TT Health-based Resolved 1992-01-01 → 1993-10-01
TT Health-based Resolved 1992-01-01 → 1993-10-01
MCL Health-based Resolved 1991-07-01 → 1991-07-31
Other Monitoring Resolved 2025-07-01
MR Monitoring Resolved 2023-07-01 → 2023-07-31
MR Monitoring Resolved 2023-07-01 → 2023-07-31

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
Nitrate
140 µg/L 1.4%
of the EPA limit 10000 µg/L
 40/40 SYR4 2012–2019
Copper
206 µg/L 16%
of the EPA limit 1300 µg/L
 32/36 SYR4 2012–2018
TTHM
25.4 µg/L 32%
of the EPA limit 80 µg/L
 32/32 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
26.8 µg/L 45%
of the EPA limit 60 µg/L
 32/32 SYR4 2012–2019
Lead
0.0064 mg/L 43%
of the EPA limit 0.0150 mg/L
 22/22 LCR 2024
Nitrate-Nitrite
140 µg/L 1.4%
of the EPA limit 10000 µg/L
 20/20 SYR4 2012–2019
Lead
32 µg/L 213%
of the EPA limit, in the worst sample — 15 µg/L
 19/37 SYR4 2012–2019
Barium
1 µg/L 0.1%
of the EPA limit 2000 µg/L
 5/20 SYR4 2012–2019
Chromium
1 µg/L 1%
of the EPA limit 100 µg/L
 2/20 SYR4 2012–2019
Fluoride
30 µg/L 0.8%
of the EPA limit 4000 µg/L
 1/20 SYR4 2012–2019
Nitrite
10 µg/L 1%
of the EPA limit 1000 µg/L
 1/20 SYR4 2012–2019
63 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, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UGross Beta Particle ActivityHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
HILLSBORO-CHERRY GROVE
Phone
503-615-6579
Email
jessica.dorsey@hillsboro-oregon.gov

Frequently asked questions about Hillsboro-Cherry Grove

Is Hillsboro-Cherry Grove tap water safe to drink?

EPA monitoring detected 11 contaminants in Hillsboro-Cherry Grove'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-Cherry Grove's water?

EPA monitoring detected Nitrate, Copper, TTHM, Total Haloacetic Acids (HAA5), Lead, and others. The full list with the level and data source for each is above.

How many people does Hillsboro-Cherry Grove serve?

Hillsboro-Cherry Grove reports serving 1,628 people in Oregon, per its EPA record.

Has Hillsboro-Cherry Grove had any water quality violations?

The EPA has 54 violations on file for Hillsboro-Cherry Grove, of which 7 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.