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Tap water quality report

Cuyamaca

EPA monitoring tested this supplier for 80 contaminants and detected 6. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

80
contaminants tested
6
detected
375
people served
1
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Native American

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.

1
health-based violations
499
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-10-17
Other Monitoring Resolved 2025-04-03
MR Monitoring Resolved 2024-07-01 → 2024-07-31
MON Monitoring Resolved 2024-07-01 → 2024-07-31
MR Monitoring Archived 2024-01-01 → 2024-12-31
MR Monitoring Archived 2024-01-01 → 2024-12-31
MR Monitoring Resolved 2023-10-31
MR Monitoring Resolved 2023-10-01
MR Monitoring Archived 2023-01-01 → 2023-12-31
MR Monitoring Archived 2023-01-01 → 2023-12-31

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
Nitrate
2300 µg/L 23%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Copper
890 µg/L 68%
of the EPA limit 1300 µg/L
 15/17 SYR4 2013–2019
Lead
3.7 µg/L 25%
of the EPA limit 15 µg/L
 9/17 SYR4 2013–2019
Lead
0.0019 mg/L 13%
of the EPA limit 0.0150 mg/L
 7/7 LCR 2023
Nitrate-Nitrite
1800 µg/L 18%
of the EPA limit 10000 µg/L
 2/2 SYR4 2013–2019
Combined Radium (-226 And -228)
0.7000 pCi/L 14%
of the EPA limit 5 pCi/L
 1/1 SYR4 2016
74 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneFluorideGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BERKSON, TONY
Phone
360-456-5221
Email
berkson.tony@nisqually-nsn.gov

Frequently asked questions about Cuyamaca

Is Cuyamaca tap water safe to drink?

EPA monitoring detected 6 contaminants in Cuyamaca'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 Cuyamaca's water?

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

How many people does Cuyamaca serve?

Cuyamaca reports serving 375 people in Washington, per its EPA record.

Has Cuyamaca had any water quality violations?

The EPA has 499 violations on file for Cuyamaca, of which 1 is 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.