Variable of interest | Active CWS with geographic coordinates n = 644 | CWS in study: active, w/ coordinates and arsenic samples n = 464 | CWS in study: < 200 connections n = 324 | CWS in study: ≥ 200 connections n = 140 |
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Total population (count) | 3,037,785 | 1,134,017 | 49,340 | 1,084,677 |
Population Characteristics (%) | ||||
People of Color (Latinos and Non-Latinos) | 53 | 55 | 38 | 56 |
White population | 47 | 45 | 62 | 44 |
Population above povertya | 57 | 54 | 60 | 54 |
Water System Characteristics (%) | ||||
Mean People of Color | 42 | 39 | 35 | 50 |
Mean Home Ownership | 67 | 70 | 72 | 67 |
Population served (mean/median) | 4,717/163 | 2,444/180 | 152/100 | 7,748/2537 |
Incorporated b | 10 | 9 | 1 | 29 |
< 200 Connections | 72 | 70 | 100 | 0 |
Groundwater Alone (GW)c | 88 | 92 | 95 | 87 |
GW and surface waterc | 7 | 4 | 2 | 9 |
Publicly ownedd | 32 | 32 | 13 | 75 |
Privately owned non-PUC reg.d | 60 | 61 | 80 | 16 |
Water Quality Characteristics | ||||
Min-Max; mean (μg As/L) | NA | 0-158; 6.0 | 0-158; 6.2 | 0-42; 57 |
IQR (μg As/L) | NA | 1.4, 6.3 | 1.4, 6.2 | 1.4, 7.3 |
CWS with 31 As MCL Viol | 44 | 34 | 15 | 19 |