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Tap water quality report

Terrace Water Company

EPA monitoring tested this supplier for 80 contaminants and detected 5. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

80
contaminants tested
5
detected
2,400
people served
12
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
GWP
Ownership
Private
Counties served
San Bernardino

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.

12
health-based violations
17
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1997-03-01 → 1997-03-31
MCL Health-based Resolved 1997-03-01 → 1997-03-31
MCL Health-based Resolved 1996-03-01 → 1996-03-31
MCL Health-based Resolved 1996-03-01 → 1996-03-31
MCL Health-based Resolved 1996-03-01 → 1996-03-31
MCL Health-based Resolved 1996-03-01 → 1996-03-31
MCL Health-based Resolved 1993-01-01 → 1993-01-31
MCL Health-based Resolved 1993-01-01 → 1993-01-31
MCL Health-based Resolved 1992-12-01 → 1993-01-31
MCL Health-based Resolved 1992-12-01 → 1993-01-31

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
1800 µg/L 18%
of the EPA limit 10000 µg/L
worst single sample: 2712 µg/L
44/44 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 16/16 LCR 2023
Combined Uranium
10.0575 µg/L 34%
of the EPA limit 30 µg/L
worst single sample: 10.728 µg/L
10/10 SYR4 2013–2017
Fluoride
297 µg/L 7.4%
of the EPA limit 4000 µg/L
worst single sample: 300 µg/L
4/5 SYR4 2013–2018
Nitrate-Nitrite
1168 µg/L 12%
of the EPA limit 10000 µg/L
worst single sample: 1200 µg/L
2/2 SYR4 2017–2018
75 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, TotalBromodichloromethaneBromoformChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic 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
CORRAL-FLORES, LAURA
Phone
909-825-5224
Email
[email protected]

Frequently asked questions about Terrace Water Company

Is Terrace Water Company tap water safe to drink?

EPA monitoring detected 5 contaminants in Terrace Water Company'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 Terrace Water Company's water?

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

How many people does Terrace Water Company serve?

Terrace Water Company reports serving 2,400 people in California, per its EPA record.

Has Terrace Water Company had any water quality violations?

The EPA has 17 violations on file for Terrace Water Company, of which 12 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.