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Tap water quality report

Rainbow Rock Mhp

EPA monitoring tested this supplier for 69 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

69
contaminants tested
13
detected
75
people served
0
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Private
Counties served
Hillsborough

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.

0
health-based violations
94
violations on file
0
still open
ViolationTypeStatusPeriod
MON Monitoring Resolved 2022-11-01 → 2022-11-30
MON Monitoring Resolved 2022-11-01 → 2022-11-30
MON Monitoring Resolved 2022-11-01 → 2022-11-30
MON Monitoring Resolved 2022-11-01 → 2022-11-30
MR Monitoring Resolved 2022-11-01 → 2022-11-30
MR Monitoring Resolved 2022-11-01 → 2022-11-30
MR Monitoring Resolved 2022-11-01 → 2022-11-30
MR Monitoring Resolved 2022-11-01 → 2022-11-30
MR Monitoring Resolved 2020-01-01 → 2021-12-31
MR Monitoring Resolved 2020-01-01 → 2021-12-31

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
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 17/17 LCR 2024
Nitrate
1900 µg/L 19%
of the EPA limit 10000 µg/L
 12/14 SYR4 2012–2019
Fluoride
240 µg/L 6%
of the EPA limit 4000 µg/L
 6/6 SYR4 2012–2018
TTHM
44.2 µg/L 55%
of the EPA limit 80 µg/L
 4/4 SYR4 2012–2018
Total Haloacetic Acids (HAA5)
29.2 µg/L 49%
of the EPA limit 60 µg/L
 4/4 SYR4 2012–2018
Barium
13.8 µg/L 0.7%
of the EPA limit 2000 µg/L
 3/3 SYR4 2012–2018
Copper
9.3 µg/L 0.7%
of the EPA limit 1300 µg/L
 3/3 SYR4 2012–2018
Antimony, Total
2.3 µg/L 38%
of the EPA limit 6 µg/L
 2/3 SYR4 2012–2018
Chromium
2.8 µg/L 2.8%
of the EPA limit 100 µg/L
 2/3 SYR4 2012–2018
Arsenic
1.3 µg/L 13%
of the EPA limit 10 µg/L
 1/3 SYR4 2012–2018
Beryllium, Total
0.1000 µg/L 2.5%
of the EPA limit 4 µg/L
 1/3 SYR4 2012–2018
Mercury
0.1000 µg/L 5%
of the EPA limit 2 µg/L
 1/3 SYR4 2012–2018
Selenium
1.3 µg/L 2.6%
of the EPA limit 50 µg/L
 1/3 SYR4 2012–2018
56 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-DAtrazineBhc-GammaBenzeneBenzo(A)PyreneChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMethoxychlorNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
DARCY SHURIN OR DAVID KNECHT
Phone
425-820-6563

Frequently asked questions about Rainbow Rock Mhp

Is Rainbow Rock Mhp tap water safe to drink?

EPA monitoring detected 13 contaminants in Rainbow Rock Mhp'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 Rainbow Rock Mhp's water?

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

How many people does Rainbow Rock Mhp serve?

Rainbow Rock Mhp reports serving 75 people in Washington, per its EPA record.

Has Rainbow Rock Mhp had any water quality violations?

The EPA has 94 violations on file for Rainbow Rock Mhp, 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.