WATER QUALITY SAMPLES FOR DISSOLVED METALS

Table 1. Results from nearshore water quality samples collected by DOH during April 2024 for dissolved metals, in micrograms per liter (µg/L).
Parameters (Dissolved) DOH EAL:
Surface Water
Action Level
for Marine Habitats
(Ecological)1
Hanakao’o Park Mala WharfPuunoa (Baby) BeachKamehameha
Iki Park
Shark Pit -
Puamana 
Launiupoko
Beach
Launiupoko Beach
Surf Break 
Olowalu Surf
Break
Kahekili (Airport)
Beach 
baseduplicatebaseduplicatebaseduplicatebaseduplicatetriplicatebaseduplicatebaseduplicatebaseduplicatebaseduplicatebaseduplicate
AluminumNDND5.6*5.5*7.015.69*6.816.185.84*8.548.618.2178.466.644.46*4.73*NDND
Antimony 300.1140.1270.1390.1170.1320.1170.1580.1150.1070.1110.1190.0990.1210.1440.140.1170.1140.1150.124
Arsenic 0.141.381.341.181.341.411.421.281.321.261.311.381.261.111.261.291.521.471.461.24
Beryllium0.038NDND0.010.008*0.010.010.0110.010.0120.0120.0110.010.0110.0110.010.0110.010.009*0.011
Cadmium 9.30.0120.0140.0080.0110.010.010.0130.0110.0160.0110.0090.010.010.0130.0110.0070.0120.0060.011
Chromium 500.1790.190.2470.2570.1960.2150.2260.2090.2340.1850.1930.220.2460.240.3430.3230.4010.3280.261
Cobalt23NDNDNDNDNDNDND0.005*NDND0.007*NDNDNDND0.011NDNDND
Copper 2.90.0690.1060.1770.0930.2560.2730.1530.1690.1750.1620.1450.1150.1760.1320.1340.1270.1210.1170.154
IronNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDND
Lead5.6ND0.003*0.003*0.004*0.003*0.003*0.0050.0050.0060.0050.004*0.004*0.004*0.003*0.003*0.003*0.003*0.004*0.004*
Manganese0.4920.4590.7520.7950.7470.6970.5970.5450.590.5690.791.191.170.9620.9290.7150.6211.040.988
Mercury0.025NDND0.0130.0140.0060.0070.0250.0240.0180.0180.0170.0150.0160.0150.0150.0050.004*0.004*0.004*
Molybdenum3709.7710.59.3310.29.810.410.410.59.3310.39.557.4410.110.310.310.110.310.29.96
Nickel8.30.1230.1510.1640.1650.1520.170.1670.1780.1510.210.1560.1330.1690.1820.170.1740.170.1930.175
Selenium710.0160.0250.0150.0270.0320.0370.0330.0290.0290.0260.0220.0290.0310.0210.013*0.0160.0290.0170.019
Silicon5657455916854365564713773598645057025056595311010633385650
Silver0.10.060.0460.120.1220.1120.1210.1120.1130.1230.1210.120.120.1170.1120.1210.1170.1150.120.118
Thallium12NDND0.010.009*0.0110.0120.010.009*0.010.009*0.007*0.010.0110.0120.0110.009*0.010.010.007*
TinNDND0.0250.020.008*0.0280.0220.0320.020.0220.0190.0190.0280.0160.0210.0340.0230.0160.024
Titanium0.2670.064*ND0.088ND0.229NDND0.0910.119NDNDNDNDNDND0.045*0.2180.285
Vanadium811.711.711.451.451.581.461.51.361.391.211.31.331.51.351.511.91.761.621.63
Zinc86NDND1.110.811.030.7010.790.9431.080.8150.931.091.081.030.7250.8370.72311.45

Coastal water quality samples were collected by DOH in accordance with DOH protocols.
DOH EAL: Hawaii DOH Environmental Action Level for screening. An entry of “—” means the analyte does not have an EAL.
The table shows valid sampling results from the sites, including duplicate and triplicate samples collected for quality assurance purposes.
Concentrations higher than DOH EALs are shown in bold font.
ND: Non-detect
*Values were J flagged in the laboratory report, indicating that the result should be considered as an estimated rather than quantitative value.
1Surface water EALs are for marine habitats and primarily consider potential harm to aquatic habitats or the potential for substances to accumulate in aquatic species. The EALs are from Table D-2b of DOH’s TGM EAL Surfer (found here: Environmental Hazard Evaluation and Environmental Action Levels – HEER Office (hawaii.gov)) from Spring 2024. Recreational water criteria for human health are based on bacteria levels in the water. See “What Do the Data Tell Us?” for explanations of why the levels shown here do not pose a risk to people using these waters for recreation.

Table 2. Results from nearshore water quality samples collected by DOH during August 2024 for dissolved metals, in micrograms per liter (µg/L).
Parameters (Dissolved) DOH EAL:
Surface Water
Action Level
for Marine Habitats
(Ecological)1
Hanakao’o Park Mala WharfPuunoa (Baby) BeachKamehameha
Iki Park
Shark Pit -
Puamana 
Launiupoko
Beach
Launiupoko Beach
Surf Break 
Olowalu Surf
Break
Kahekili (Airport)
Beach 
baseduplicatebaseduplicatebaseduplicatebaseduplicatebaseduplicatebaseduplicatetriplicatebaseduplicatebaseduplicatebaseduplicate
Aluminum 9.4610.24.26*3.74*4.57*5.08*8.53118.1410.19.31158.588.697.385.02*4.24*NDND
Antimony300.1290.1070.1250.2520.1090.030.0950.0430.0590.0740.0490.0730.0830.0780.0620.0940.0510.1020.031
Arsenic0.141.010.5760.5040.760.5180.6380.5510.8570.5570.8070.730.4660.5960.6650.4280.660.5230.6270.556
Beryllium 0.0380.0140.0120.038NDNDNDNDND0.005*0.0110.005*NDND0.01ND0.005*ND0.008*ND
Cadmium 9.30.058ND0.022ND0.0090.0110.0360.0430.0280.030.0180.0180.0280.0290.0360.0180.0370.0250.01
Chromium 500.1640.2060.1680.1310.1340.1160.1720.2540.190.1950.2570.3490.2220.1940.1940.2020.2060.1440.131
Cobalt 23NDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDND
Copper 2.90.1490.170.1350.0820.1510.1130.1480.1170.1290.1530.1560.1510.1340.1370.1280.1350.1260.0370.018
Iron NDNDNDNDNDNDNDND13.1NDNDNDNDNDNDNDNDNDND
Lead5.60.0140.0180.0180.0080.003*0.0060.003*ND0.003*0.0050.007ND0.003*0.01ND0.004*ND0.0120.005
Manganese 0.380.1910.1880.2470.0660.1870.2290.4220.2790.3170.640.3110.3510.3980.2170.1680.2220.1530.08
Mercury0.025NDNDNDNDNDND0.0040.004*0.003*0.004*ND0.003*ND0.003*0.004*NDNDNDND
Molybdenum 3709.79.899.39.29.19.39.067.389.28.29.29.38.513.17.48.96.1810.610.5
Nickel8.30.1670.1470.1350.1020.0940.0920.1430.1950.1570.1680.1710.1650.1750.1590.1820.1230.1940.1380.128
Selenium710.006*0.0440.0460.0280.0590.047ND0.017NDND0.0230.019*0.019*0.0310.014*0.018*0.030.02ND
Silicon0.3250.365ND0.05250.0050.0320.1260.0530.079NDNDND0.093NDNDND0.1260.0520.012
Silver0.10.1160.0720.070.0550.0330.0740.1450.1780.1630.1790.1580.1450.150.1510.1550.1310.1420.0390.068
Thallium 12NDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDND
Tin 0.1130.054NDNDNDND0.2860.3060.2790.3190.3430.2680.3210.250.2690.3210.206NDND
Titanium0.10.1310.06*0.051*0.077NDND0.065*0.05*0.063*0.0710.0850.054*0.118ND0.064*0.038*0.051*ND
Vanadium 812.322.141.61.581.531.661.551.491.571.731.791.61.691.651.611.671.561.61.67
Zinc 861.151.140.461.030.1990.5011.182.12.160.70.7631.121.072.661.040.7740.4630.520.586

Coastal water quality samples were collected by DOH in accordance with DOH protocols.
DOH EAL: Hawaii DOH Environmental Action Level for screening. An entry of “—” means the analyte does not have an EAL.
The table shows valid sampling results from the sites, including duplicate and triplicate samples collected for quality assurance purposes.
Concentrations higher than DOH EALs are shown in bold font.
ND: Non-detect
*Values were J flagged in the laboratory report, indicating that the result should be considered as an estimated rather than quantitative value.
1Surface water EALs are for marine habitats and primarily consider potential harm to aquatic habitats or the potential for substances to accumulate in aquatic species. The EALs are from Table D-2b of DOH’s TGM EAL Surfer (found here: Environmental Hazard Evaluation and Environmental Action Levels – HEER Office (hawaii.gov)) from Spring 2024. Recreational water criteria for human health are based on bacteria levels in the water. See “What Do the Data Tell Us?” for explanations of why the levels shown here do not pose a risk to people using these waters for recreation.