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Tap water quality report

South Gate-City, Water Dept.

EPA monitoring tested this supplier for 112 contaminants and detected 31. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

112
contaminants tested
31
detected
76,443
people served
4
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Local government
Counties served
Los Angeles

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.

4
health-based violations
118
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2004-09-01 → 2004-09-30
MCL Health-based Resolved 2004-09-01 → 2004-09-30
MCL Health-based Resolved 2000-08-01 → 2000-08-31
MCL Health-based Resolved 2000-08-01 → 2000-08-31
MR Monitoring Resolved 2018-04-01 → 2018-06-30
MR Monitoring Resolved 2018-04-01 → 2018-06-30
MR Monitoring Resolved 2018-04-01 → 2018-06-30
MR Monitoring Resolved 2018-04-01 → 2018-06-30
MR Monitoring Resolved 2018-04-01 → 2018-06-30
MR Monitoring Resolved 2018-04-01 → 2018-06-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfhxa 0.0061 µg/L 4/10 2024
PFHXS 0.0060 µg/L 4/10 2024
PFOA 0.0100 µg/L 4/10 2024
PFOS 0.0260 µg/L 4/10 2024
Pfpea 0.0063 µg/L 4/10 2024
PFBS 0.0039 µg/L 2/10 2024

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
Tetrachloroethylene
7.128 µg/L 143%
of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 9.26 µg/L
919/1023 SYR4 2012–2019
Trichloroethylene
4.905 µg/L 98%
of the EPA limit 5 µg/L
worst single sample: 6.1 µg/L
480/672 SYR4 2012–2019
Nitrate
2079.2 µg/L 21%
of the EPA limit 10000 µg/L
worst single sample: 2400 µg/L
248/286 SYR4 2012–2019
TTHM
10.868 µg/L 14%
of the EPA limit 80 µg/L
worst single sample: 15 µg/L
65/81 SYR4 2013–2019
Bromoform
5.545 µg/L
No EPA limit set
worst single sample: 5.9 µg/L
51/75 SYR4 2012–2019
Dibromochloromethane
4.43 µg/L
No EPA limit set
worst single sample: 6 µg/L
48/74 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
28.124 µg/L 47%
of the EPA limit 60 µg/L
worst single sample: 57.81 µg/L
35/55 SYR4 2016–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 32/32 LCR 2024
Bromodichloromethane
2.05 µg/L
No EPA limit set
worst single sample: 2.2 µg/L
31/67 SYR4 2013–2019
Fluoride
375.5 µg/L 9.4%
of the EPA limit 4000 µg/L
worst single sample: 470 µg/L
30/30 SYR4 2012–2019
Dibromoacetic Acid
1.714 µg/L
No EPA limit set
worst single sample: 1.8 µg/L
29/47 SYR4 2016–2019
Combined Uranium
5.68435 µg/L 19%
of the EPA limit 30 µg/L
worst single sample: 6.109 µg/L
20/25 SYR4 2012–2019
1,1-Dichloroethylene
0.7350 µg/L 11%
of the EPA limit 7 µg/L
worst single sample: 0.8100 µg/L
16/147 SYR4 2012–2019
Arsenic
2.8 µg/L 28%
of the EPA limit 10 µg/L
 15/25 SYR4 2012–2019
Barium
202 µg/L 10%
of the EPA limit 2000 µg/L
worst single sample: 290 µg/L
12/25 SYR4 2012–2019
Chloroform
0.2000 µg/L
No EPA limit set
 6/60 SYR4 2013–2019
Dichloroacetic Acid
1 µg/L
No EPA limit set
 4/43 SYR4 2016–2019
Monobromoacetic Acid
1.319 µg/L
No EPA limit set
worst single sample: 1.34 µg/L
4/43 SYR4 2016–2019
Monochloroacetic Acid
1 µg/L
No EPA limit set
 4/43 SYR4 2016–2019
Trichloroacetic Acid
1.425 µg/L
No EPA limit set
worst single sample: 1.5 µg/L
4/43 SYR4 2016–2019
Nitrate-Nitrite
458000 µg/L 4580%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 460000 µg/L
2/2 SYR4 2013
Copper
2.7 µg/L 0.2%
of the EPA limit 1300 µg/L
 1/38 SYR4 2012–2019
Chromium
10 µg/L 10%
of the EPA limit 100 µg/L
 1/35 SYR4 2012–2019
Dichloromethane
1 µg/L 20%
of the EPA limit 5 µg/L
 1/137 SYR4 2012–2019
Gross Beta Particle Activity
3.8 pCi/L
No EPA limit set
 1/1 SYR4 2015
81 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
CERVANTES, ARTURO
Phone
323-563-9567
Email
[email protected]

Frequently asked questions about South Gate-City, Water Dept.

Is South Gate-City, Water Dept. tap water safe to drink?

EPA monitoring detected 31 contaminants in South Gate-City, Water Dept.'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 South Gate-City, Water Dept.'s water?

EPA monitoring detected Tetrachloroethylene, Trichloroethylene, Nitrate, TTHM, Bromoform, and others. The full list with the level and data source for each is above.

How many people does South Gate-City, Water Dept. serve?

South Gate-City, Water Dept. reports serving 76,443 people in California, per its EPA record.

Has South Gate-City, Water Dept. had any water quality violations?

The EPA has 118 violations on file for South Gate-City, Water Dept., of which 4 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.