Irvine Ranch Water District is a large public water system in EPA region 9 that provides tap water for the 92602 - 92604, 92610, 92614, 92618 - 92620, 92626, 92627, 92650, 92660, 92676, 92705, 92782 zip codes. It has 46 facilities where the water supply was tested for 85 chemical contaminants that impact tap water quality and human health.
The maximum reported level of HAA5 (five regulated haloacetic acids) was 40.05 µg/L. The maximum reported level of Manganese was 2.69 µg/L. There were 2 contamintants found in the Irvine Ranch Water District water supply at levels that were above the minimum reporting level.
Baker Water TP
Surface Water (SW)EP BWTP Effluent (CT2)Entry Point to the Distribution System (EP)
MWD-OC 73
Surface Water (SW)EP-OC-73Entry Point to the Distribution System (EP)
DRWF Blending (DRWF Wells & DATS)
Ground Water (GW)EP #52 - DL-IRWD-01Entry Point to the Distribution System (EP)
IDP - Desalter Plant
Ground Water (GW)EP #60 - DS-IRWDPTP-TOTALBLENDEntry Point to the Distribution System (EP)
MWD Intertie 1
Surface Water (SW)IS-DIEMER-PLANTEFF-IRWDEntry Point to the Distribution System (EP)
IRWD-2122 Desalter Plant
Ground Water (GW)DS-IRWD-2122 Total BlendEntry Point to the Distribution System (EP)
OPA Well Treatment Effluent
Ground Water (GW)PFAS-IRWDOPA-IX-FNSHEntry Point to the Distribution System (EP)
DL-IRWD-BAKE-01Distribution System (DS)
DL-IRWD-YALE-01Distribution System (DS)
DL-IRWD-COUNTRYSIDE-01Distribution System (DS)
DL-IRWD-OC73-01Distribution System (DS)
DL-IRWD-VISTARIDGE-01Distribution System (DS)
DL-IRWD-BAXTER-01Distribution System (DS)
DL-IRWD-SADDLEBACKRANCH-01Distribution System (DS)
DL-IRWD-CM10-01Distribution System (DS)
DL-IRWD-CHAPMAN-01Distribution System (DS)
DL-IRWD-RIDGELINE-01Distribution System (DS)
DL-IRWD-VISTARIDGE-02Distribution System (DS)
MWD AMP
Surface Water (SW)IS-DIEMER-AMP-IRWDEntry Point to the Distribution System (EP)
MWD-OC 74
Surface Water (SW)EP-OC 74Entry Point to the Distribution System (EP)
MWD/DRWF/PTP/21/22
Multiple Sources (MX)#302-Parker n/o ToledoEntry Point to the Distribution System (EP)
EP-Tustin Zn 3-5 PSEntry Point to the Distribution System (EP)
Manning Water TP
Surface Water (SW)EP MWTP EffluentEntry Point to the Distribution System (EP)
MWD/DRWF/PTP/21/22/BWTP/LF-2
Multiple Sources (MX)Tustin Zn 3-5 PSEntry Point to the Distribution System (EP)
Santiago Reservoir
Multiple Sources (MX)RES-OPASANTIAGO-01Entry Point to the Distribution System (EP)
#543-Countryside
Multiple Sources (MX)MR-#543 (Zn 2 E Res/#302)Maximum Residence Time (MR)
#960-Silverado
Multiple Sources (MX)MR-#960 (MWTP-effl/OC68/Tustin Zn 3-5 PS)Maximum Residence Time (MR)
LF Well 2
Multiple Sources (MX)EP-Zone 2 East ResEntry Point to the Distribution System (EP)
#340-Lake Center
Multiple Sources (MX)MR #340 Lake Center (OC74/#302)Maximum Residence Time (MR)
Distribution System- DSMRT Site- GW
Ground Water (GW)RES-IRWDSANTIAGO-01Maximum Residence Time (MR)
DL-IRWD-RESEARCH-01Maximum Residence Time (MR)
Distribution System - DSMRT Site-SW
Surface Water (SW)DL-IRWD-TUSTINRANCHRD-01Maximum Residence Time (MR)
Distribution System - DSMRT Site-SW
Multiple Sources (MX)DL-IRWD-CHAPMAN-01Maximum Residence Time (MR)
MWD-OC68
Surface Water (SW)IS-DIEMER-AMP-01Entry Point to the Distribution System (EP)
MWD-OC71
Surface Water (SW)IS-DIEMER-AMP-01Entry Point to the Distribution System (EP)
MWD-OC72
Surface Water (SW)IS-DIEMER-AMP-01Entry Point to the Distribution System (EP)
MWD-OC7
Surface Water (SW)IS-F6-01Entry Point to the Distribution System (EP)
D/DBP Max. Residence Time-Site 1
Ground Water (GW)RES-IRWDSANTIAGO-01Maximum Residence Time (MR)
D/DPB Max. Resident Time - Site 2
Ground Water (GW)DL-IRWD-RESEARCH-01Maximum Residence Time (MR)
D/DBP Max. Residence Time - Site 3
Surface Water (SW)DL-IRWD-TUSTINRANCHRD-01Maximum Residence Time (MR)
WELL 01
Ground Water (GW)WELL 01 05S/10W-26L01SR (SR)
WELL 02
Ground Water (GW)WELL 02 05S/10W-25K01SR (SR)
WELL 04
Ground Water (GW)WELL 04 05S/10W-25F01SR (SR)
WELL 12
Ground Water (GW)WELL 12 05S/10W-22Q01SR (SR)
WELL 13
Ground Water (GW)WELL 13 05S/10W-27G01SR (SR)
WELL 14
Ground Water (GW)WELL 14 05S/10W-27B01SR (SR)
WELL 18
Ground Water (GW)WELL 18 05S/10W-26C01SR (SR)
WELL 11
Ground Water (GW)WELL 11 05S/10W-26M01SR (SR)
WELL 15
Ground Water (GW)WELL 15 05S/10W-27A01SR (SR)
WELL 06
Ground Water (GW)WELL 06 05S/10W-25B02SR (SR)
WELL 03
Ground Water (GW)WELL 03 05S/09W-30G02SR (SR)
WELL 10
Ground Water (GW)WELL 10 05S/10W-27C01SR (SR)
WELL 17
Ground Water (GW)WELL 17 05S/10W-22P01SR (SR)
WELL 07
Ground Water (GW)WELL 07 05S/10W-27A02SR (SR)
WELL 05
Ground Water (GW)WELL 05 05S/09W-30E01SR (SR)
WELL 16
Ground Water (GW)WELL 16 05S/10W-27C02SR (SR)
WELL C8
Ground Water (GW)WELL C8 3010092-023 (IRWD-C8/1)SR (SR)
WELL C9
Ground Water (GW)WELL C9 3010092-024 (IRWD-C9/1)SR (SR)
DL-IRWD-01
Ground Water (GW)IRWD SAMPLE STATION ON BARRANCA, W OF RED HILLEntry Point to the Distribution System (EP)
The latest water samples were taken on January 27th, 2025.