Table 1.
H2O2concentrations in various waters.
| Type | Location | [H2O2] | Reference |
|---|---|---|---|
| Freshwater | Jacks Lake, Ontario, surface | 10–800 nM | [19] |
| Swedish Highland Lakes, surface | 132–984 nM | [247] | |
| Lake Erie, surface | 50–175 nM | [248] | |
| Brackish | Patuxent Estuary, surface | 12–350 nM | [22] |
| Chesapeake Bay, surface | 3–1700 nM | [15] | |
| Chesapeake Bay, surface | 40–80 nM | [248] | |
| Coastal Germany, Intertidal salt flat | 0.1–4.5 μM | [23] | |
| Southern Ocean, tidepool | 2 μM | [249] | |
| Coastal | Southern Ocean | 1.5 μM | [249] |
| Antarctica | 9–25 nM | [250] | |
| Peru | 80–500 nM | [251] | |
| Southern California | 44–370 nM | [252] | |
| Baja California | 50–125 nM | [248] | |
| Texas | 14–170 nM | [10] | |
| Florida | 80–210 nM | [15] | |
| Gulf of Mexico | 100–240 nM | [253] | |
| Bahamas | 50–190 nM | [15] | |
| Amazon River plume | 25–165 nM | [21] | |
| Open ocean surface | Tropical Pacific | 50–150 nM | [200] |
| Tropical Pacific, during rain | 100–300 nM | [28] | |
| North Pacific | 25–120 nM | [254] | |
| South and Central Atlantic | 16–68 nM | [21] | |
| Subtropical Atlantic | 50–220 nM | [18] | |
| Equatorial Atlantic ITCZ | 31–236 nM | [255] | |
| Caribbean Sea | 50–100 nM | [256] | |
| Gulf of Mexico | 90–140 nM | [253] | |
| Sargasso Sea | 95–175 nM | [257] | |
| Western Atlantic | 40–175 nM | [248] | |
| Eastern Atlantic | 30–80 nM | [258] | |
| North Atlantic | 135–483 nM | [32] | |
| Bermuda Atlantic Time Series | 20–200 nM | [31] | |
| Mediterranean Sea | 100–140 nM | [259] | |
| Southern Ocean Indian Sector | 5–20 nM | [260] | |
| Open ocean depths | North Pacific, >1000 m | <6 nM | [261] |
| Mediterranean, South Atlantic and Pacific, >1000 m | <3 nM | [262] | |
| South and Central Atlantic, below euphotic zone | <1 nM | [21] | |
| Bermuda Atlantic Time Series, 150 m | <2 nM | [31] | |
| Precipitation | South and Central Atlantic, rain | 3.5–71 μM | [27] |
| Equatorial Atlantic ITCZ | 1.5–22.8 μM | [255] | |
| Gulf of Mexico, rain | 40.2 μM | [263] | |
| Florida Keys, rain | 28.4 μM | [263] | |
| Miami/Bahamas, rain | 30.7 μM | [264] | |
| West Atlantic, rain | 12.7 μM | [263] | |
| Bermuda Atlantic Time Series, rain | 11–40 μM | [31] | |
| Bermuda Atlantic Time Series, rain | 5–85 μM | [26] | |
| New Zealand, rain | 10–30 μM | [30] | |
| Equatorial Pacific, rain | 8.5 μM | [28] | |
| North Pacific ITCZ, rain | 10.4 μM | [28] | |
| Jacks Lake, Ontario, rain | 1.3–34 μM | [19] | |
| Southern Ocean, snow | 10–14 μM | [249] | |