Is Delphian School Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Mixed public/private
Counties served: Yamhill

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
Other	Monitoring	Resolved	2025-07-01
Other	Monitoring	Resolved	2024-07-01
MON	Monitoring	Resolved	2022-12-01 → 2022-12-31
MR	Monitoring	Resolved	2017-09-26
MR	Monitoring	Resolved	2014-10-01 → 2015-09-30
MR	Monitoring	Resolved	2014-10-01 → 2015-09-30
MR	Monitoring	Resolved	2010-07-01 → 2010-07-31
MR	Monitoring	Resolved	2010-07-01 → 2010-07-31
MR	Monitoring	Resolved	2009-01-01 → 2009-01-31
MR	Monitoring	Resolved	2009-01-01 → 2009-01-31

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Lead	0.0011 mg/L 7.3% of the EPA limit 0.0150 mg/L	18/18	LCR	2025
Copper	137.7 µg/L 11% of the EPA limit 1300 µg/L worst single sample: 144 µg/L	10/15	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	34.69 µg/L 58% of the EPA limit 60 µg/L worst single sample: 36.1 µg/L	7/8	SYR4	2012–2019
Nitrate	500 µg/L 5% of the EPA limit 10000 µg/L	4/16	SYR4	2012–2019
TTHM	14.155 µg/L 18% of the EPA limit 80 µg/L worst single sample: 15.4 µg/L	4/8	SYR4	2012–2019
Lead	4.19 µg/L 28% of the EPA limit 15 µg/L worst single sample: 4.2 µg/L	3/15	SYR4	2013–2019

51 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-DArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneChlorobenzeneCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: DELPHIAN SCHOOL
Phone: 503-843-3521
Email: [email protected]

Frequently asked questions about Delphian School

Is Delphian School tap water safe to drink?

EPA monitoring detected 6 contaminants in Delphian School'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 Delphian School's water?

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

How many people does Delphian School serve?

Delphian School reports serving 350 people in Oregon, per its EPA record.

Has Delphian School had any water quality violations?

The EPA has 24 violations on file for Delphian School, 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.